ACS Instrument Handbook - HST User Documentation

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margin-bottom: 8px; table-layout: fixed; width: 100%;" class="conf-macro output-block" data-hasbody="true" data-macro-name="sp-pagelayout"> <div style="display: table-cell; margin: 8px 0; padding: 0 10px; vertical-align: top; word-wrap: break-word; width: auto;"> <div style="display: block; overflow-x: auto;"> <p><em>Version 24.0 – December 2024<br></em><a data-macro-name="sp-plaintextbody-link" href="/acsihb/files/147481397/147481398/1/1736450974130/acs_ihb.pdf" class="conf-macro output-inline" data-hasbody="true">PDF version</a></p><h1 id="ACSInstrumentHandbook-AdvancedCameraforSurveysInstrumentHandbookforCycle33">Advanced Camera for Surveys Instrument Handbook for Cycle 33</h1><p><span>(With Historical Information for the Inoperative HRC Channel</span>)</p><p><br></p><div class="noprint conf-macro output-block" data-hasbody="true" data-macro-name="noprint"><h1 id="ACSInstrumentHandbook-TableofContents">Table of Contents</h1><p><br></p><div class="plugin_pagetree conf-macro output-inline" data-hasbody="false" data-macro-name="pagetree"> <div id="pagetreesearch"> <form method="POST" class="aui" action="/plugins/pagetreesearch/pagetreesearch.action" name="pagetreesearchform"> <input type="hidden" name="atl_token" value="fe6b674b718587bc8de030d70fa6cc89ab6e2fdb"> <input type="hidden" name="ancestorId" value="147481397"> <input type="hidden" name="spaceKey" value="ACSIHB"> <input type="text" class="text medium-field" size="20" name="queryString"> <input type="submit" class="aui-button" value="Search"> </form> </div> <div> <span class="plugin_pagetree_status hidden">Collapse all</span> <div class="plugin_pagetree_expandcollapse"> <a rel="nofollow" class="plugin_pagetree_expandall" href="#">Expand all</a>   <a rel="nofollow" class="plugin_pagetree_collapseall" href="#">Collapse all</a> </div> </div> <ul role="list" aria-busy="true" class="plugin_pagetree_children_list plugin_pagetree_children_list_noleftspace"> <div class="plugin_pagetree_children"> </div> </ul> <fieldset class="hidden"> <input type="hidden" name="treeId" value=""> <input type="hidden" name="treeRequestId" value="/plugins/pagetree/naturalchildren.action?decorator=none&excerpt=false&sort=position&reverse=false&disableLinks=false&expandCurrent=false&placement="> <input type="hidden" name="treePageId" value="147481397"> <input type="hidden" name="noRoot" value="false"> <input type="hidden" name="rootPageId" value="147481397"> <input type="hidden" name="rootPage" value=""> <input type="hidden" name="startDepth" value="0"> <input type="hidden" name="spaceKey" value="ACSIHB"> <input type="hidden" name="i18n-pagetree.loading" value="Loading..."> <input type="hidden" name="i18n-pagetree.error.permission" value="Unable to load page tree. It seems that you do not have permission to view the root page."> <input type="hidden" name="i18n-pagetree.eeror.general" value="There was a problem retrieving the page tree. Please check the server log file for more information."> <input type="hidden" name="loginUrl" value="/login.action?os_destination=%2Facsihb&permissionViolation=true"> <input type="hidden" name="mobile" value="false"> <input type="hidden" name="placement" value=""> <fieldset class="hidden"> <input type="hidden" name="ancestorId" value="147481397"> </fieldset> </fieldset> </div></div><p></p><h1 id="ACSInstrumentHandbook-UserSupport"><span style="font-size: 24.0px;">User Support</span></h1><p>Please contact the HST Help Desk for assistance. We encourage users to access the web portal where you can submit your questions directly to the appropriate team of experts.</p><ul><li>Web: <a rel="nofollow" class="external-link" href="http://hsthelp.stsci.edu/">http://hsthelp.stsci.edu</a></li><li>E-mail: <a rel="nofollow" class="external-link" href="mailto:help@stsci.edu">help@stsci.edu</a></li></ul><h1 id="ACSInstrumentHandbook-AdditionalResources">Additional Resources</h1><p>Information and other resources are available from the STScI website:</p><ul><li><a rel="nofollow" class="external-link" href="http://www.stsci.edu/hst/instrumentation/acs">http://www.stsci.edu/hst/instrumentation/acs</a></li></ul><h1 id="ACSInstrumentHandbook-RevisionHistory">Revision History</h1><div class="table-wrap"><table class="wrapped confluenceTable"><colgroup><col><col><col></colgroup><tbody><tr><th class="confluenceTh"><p>Version</p></th><th class="confluenceTh"><p>Date</p></th><th class="confluenceTh"><p>Editors</p></th></tr><tr><td class="confluenceTd">24.0</td><td class="confluenceTd">December 2024</td><td class="confluenceTd">Stark, D. V. et al.</td></tr><tr><td class="confluenceTd">23.0</td><td class="confluenceTd">December 2023</td><td class="confluenceTd">Ryon, J. E., Stark, D. V., et al.</td></tr><tr><td class="confluenceTd">22.0</td><td class="confluenceTd">March 2023</td><td class="confluenceTd">Ryon, J. E., et al.</td></tr><tr><td class="confluenceTd">21.0</td><td class="confluenceTd">January 2022</td><td class="confluenceTd">Ryon, J. E., et al.</td></tr><tr><td class="confluenceTd">20.0</td><td class="confluenceTd">January 2021</td><td class="confluenceTd">Ryon, J. E., et al.</td></tr><tr><td class="confluenceTd">19.0</td><td class="confluenceTd">December 2019</td><td class="confluenceTd">Ryon, J. E., et al.</td></tr><tr><td class="confluenceTd"><p>18.0</p></td><td class="confluenceTd"><p>January 2019</p></td><td class="confluenceTd"><p>Ryon, J. E., et al.</p></td></tr><tr><td class="confluenceTd"><p>17.0</p></td><td class="confluenceTd"><p>May 2018</p></td><td class="confluenceTd"><p>Ryon, J. E., et al.</p></td></tr><tr><td class="confluenceTd"><p>16.0</p></td><td class="confluenceTd"><p>January 2017</p></td><td class="confluenceTd"><p>Avila, R., et al.</p></td></tr><tr><td class="confluenceTd"><p>15.0</p></td><td class="confluenceTd"><p>January 2016</p></td><td class="confluenceTd"><p>Avila, R., et al.</p></td></tr><tr><td class="confluenceTd"><p>14.0</p></td><td class="confluenceTd"><p>January 2015</p></td><td class="confluenceTd"><p>Avila, R., et al.</p></td></tr><tr><td class="confluenceTd"><p>13.0</p></td><td class="confluenceTd"><p>January 2014</p></td><td class="confluenceTd"><p>Ubeda, L., et al.</p></td></tr><tr><td class="confluenceTd"><p>12.0</p></td><td class="confluenceTd"><p>December 2012</p></td><td class="confluenceTd"><p>Ubeda, L., et al.</p></td></tr><tr><td class="confluenceTd"><p>11.0</p></td><td class="confluenceTd"><p>December 2011</p></td><td class="confluenceTd"><p>Ubeda, L., et al.</p></td></tr><tr><td class="confluenceTd"><p>10.0</p></td><td class="confluenceTd"><p>December 2010</p></td><td class="confluenceTd"><p>Maybhate, A. and Armstrong, A., et al.</p></td></tr><tr><td class="confluenceTd"><p>9.0</p></td><td class="confluenceTd"><p>January 2010</p></td><td class="confluenceTd"><p>Maybhate, A., et al.</p></td></tr><tr><td class="confluenceTd"><p>8.0</p></td><td class="confluenceTd"><p>December 2007</p></td><td class="confluenceTd"><p>Boffi, F.R., et al.</p></td></tr><tr><td class="confluenceTd"><p>7.1</p></td><td class="confluenceTd"><p>December 2006</p></td><td class="confluenceTd"><p>Pavlovsky, C. et al.</p></td></tr><tr><td class="confluenceTd"><p>7.0</p></td><td class="confluenceTd"><p>October 2006</p></td><td class="confluenceTd"><p>Pavlovsky, C., et al.</p></td></tr><tr><td class="confluenceTd"><p>6.0</p></td><td class="confluenceTd"><p>October 2005</p></td><td class="confluenceTd"><p>Gonzaga, S., et al.</p></td></tr><tr><td class="confluenceTd"><p>5.0</p></td><td class="confluenceTd"><p>October 2004</p></td><td class="confluenceTd"><p>Pavlovsky, C., et al.</p></td></tr><tr><td class="confluenceTd"><p>4.0</p></td><td class="confluenceTd"><p>October 2003</p></td><td class="confluenceTd"><p>Pavlovsky, C., et al.</p></td></tr><tr><td class="confluenceTd"><p>3.0</p></td><td class="confluenceTd"><p>October 2002</p></td><td class="confluenceTd"><p>Pavlovsky, C., et al.</p></td></tr><tr><td class="confluenceTd"><p>2.1</p></td><td class="confluenceTd"><p>July 2001</p></td><td class="confluenceTd"><p>Pavlovsky, C., et al.</p></td></tr><tr><td class="confluenceTd"><p>2.0</p></td><td class="confluenceTd"><p>June 2001</p></td><td class="confluenceTd"><p>Suchkov, A., et al.</p></td></tr><tr><td class="confluenceTd"><p>1.0</p></td><td class="confluenceTd"><p>June 2000</p></td><td class="confluenceTd"><p>Jedrzejewski, R., et al.</p></td></tr></tbody></table></div><h1 id="ACSInstrumentHandbook-Citation">Citation</h1><p>In publications, refer to this document as:</p><ul><li>Stark, D. V., et al. 2024, “ACS Instrument Handbook,” Version 24.0 (Baltimore: STScI)</li></ul><p><br></p> </div> </div> </div> <div class="next-prev"> <a href="" id=prev-link>«Previous</a> <a href="" id=next-link>Next»</a> </div> <div class="space-search"> <form action="/dosearchsite.action" class="space-search-form row reverse fill" method="GET" id="space-search-form"> <button class='aui-button aui-button-subtle' type='submit' form='search-form'><span class="aui-icon aui-icon-large aui-iconfont-search">Search</span></button> <input type="text" v-on:keyup="search" class="fill" id="q" autocomplete="off" name="queryString" value="" placeholder="Search ACS Instrument Handbook" /> <input type="hidden" name="s" value="*" /> <input type="hidden" id=where name="where" value="ACSIHB" /> <div id="space-quick-search" class="space-quick-search"> <ul> <li v-for="result in results"> <a :href="result.href" :class="result.className"><span>{{result.name}}</span></a> </li> </ul> </div> </form> </div> <div 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class="no-children">•</span> <a href="/acsihb/chapter-1-introduction">Chapter 1: Introduction</a> </li> <li id="pageTree_147481403" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-2-considerations-and-changes-after-sm4">Chapter 2: Considerations and Changes After SM4</a> <ul id="pagetreelvl3"> <li id="pageTree_147481404" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-2-considerations-and-changes-after-sm4/2-1-sm4-repair-of-acs">2.1 SM4 Repair of ACS</a> </li> <li id="pageTree_147481405" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-2-considerations-and-changes-after-sm4/2-2-acs-wfc-observations-in-cycle-33-and-beyond">2.2 ACS/WFC Observations in Cycle 33 and Beyond</a> </li> <li id="pageTree_147481406" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-2-considerations-and-changes-after-sm4/2-3-comparison-of-wfc-and-uvis">2.3 Comparison of WFC and UVIS</a> </li> <li id="pageTree_147481409" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-2-considerations-and-changes-after-sm4/2-4-comparison-of-hrc-and-uvis">2.4 Comparison of HRC and UVIS</a> </li> <li id="pageTree_147481410" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-2-considerations-and-changes-after-sm4/2-5-dithering-considerations">2.5 Dithering Considerations</a> </li> <li id="pageTree_147481411" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-2-considerations-and-changes-after-sm4/2-6-cte-considerations">2.6 CTE Considerations</a> </li> <li id="pageTree_147481412" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-2-considerations-and-changes-after-sm4/2-7-sbc-considerations">2.7 SBC Considerations</a> </li> </ul> </li> <li id="pageTree_147481413" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-3-acs-capabilities-design-and-operations">Chapter 3: ACS Capabilities, Design and Operations</a> <ul id="pagetreelvl3"> <li id="pageTree_147481414" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-3-acs-capabilities-design-and-operations/3-1-acs-location-in-the-hst-focal-plane">3.1 ACS Location in the HST Focal Plane</a> </li> <li id="pageTree_147481416" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-3-acs-capabilities-design-and-operations/3-2-instrument-capabilities">3.2 Instrument Capabilities</a> </li> <li id="pageTree_147481417" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-3-acs-capabilities-design-and-operations/3-3-instrument-design">3.3 Instrument Design</a> </li> <li id="pageTree_147481420" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-3-acs-capabilities-design-and-operations/3-4-basic-instrument-operations">3.4 Basic Instrument Operations</a> </li> <li id="pageTree_147481421" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-3-acs-capabilities-design-and-operations/3-5-acs-quick-reference-guide">3.5 ACS Quick Reference Guide</a> </li> </ul> </li> <li id="pageTree_147481422" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-4-detector-performance">Chapter 4: Detector Performance</a> <ul id="pagetreelvl3"> <li id="pageTree_147481423" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-4-detector-performance/4-1-overview">4.1 Overview</a> </li> <li id="pageTree_147481424" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-4-detector-performance/4-2-the-ccds">4.2 The CCDs</a> </li> <li id="pageTree_147481430" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-4-detector-performance/4-3-ccd-operations-and-limitations">4.3 CCD Operations and Limitations</a> </li> <li id="pageTree_147481446" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-4-detector-performance/4-4-the-sbc-mama">4.4 The SBC MAMA</a> </li> <li id="pageTree_147481450" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-4-detector-performance/4-5-sbc-operations-and-limitations">4.5 SBC Operations and Limitations</a> </li> <li id="pageTree_147481459" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-4-detector-performance/4-6-sbc-bright-object-limits">4.6 SBC Bright-Object Limits</a> </li> </ul> </li> <li id="pageTree_147481460" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-5-imaging">Chapter 5: Imaging</a> <ul id="pagetreelvl3"> <li id="pageTree_147481461" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-5-imaging/5-1-imaging-overview">5.1 Imaging Overview</a> </li> <li id="pageTree_147481468" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-5-imaging/5-2-important-considerations-for-acs-imaging">5.2 Important Considerations for ACS Imaging</a> </li> <li id="pageTree_147481472" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-5-imaging/5-3-wide-field-optical-ccd-imaging">5.3 Wide Field Optical CCD Imaging</a> </li> <li id="pageTree_147481476" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-5-imaging/5-4-high-resolution-optical-and-uv-imaging">5.4 High-Resolution Optical and UV Imaging</a> </li> <li id="pageTree_147481477" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-5-imaging/5-5-ultraviolet-imaging-with-the-sbc">5.5 Ultraviolet Imaging with the SBC</a> </li> <li id="pageTree_147481479" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-5-imaging/5-6-acs-point-spread-functions">5.6 ACS Point Spread Functions</a> </li> </ul> </li> <li id="pageTree_147481487" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-6-polarimetry-coronagraphy-prism-and-grism-spectroscopy">Chapter 6: Polarimetry, Coronagraphy, Prism and Grism Spectroscopy</a> <ul id="pagetreelvl3"> <li id="pageTree_147481488" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-6-polarimetry-coronagraphy-prism-and-grism-spectroscopy/6-1-polarimetry">6.1 Polarimetry</a> </li> <li id="pageTree_147481490" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-6-polarimetry-coronagraphy-prism-and-grism-spectroscopy/6-2-coronagraphy">6.2 Coronagraphy</a> </li> <li id="pageTree_147481506" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-6-polarimetry-coronagraphy-prism-and-grism-spectroscopy/6-3-grism-and-prism-spectroscopy">6.3 Grism and Prism Spectroscopy</a> </li> </ul> </li> <li id="pageTree_147481517" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-7-observing-techniques">Chapter 7: Observing Techniques</a> <ul id="pagetreelvl3"> <li id="pageTree_147481518" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-1-designing-an-acs-observing-proposal">7.1 Designing an ACS Observing Proposal</a> </li> <li id="pageTree_147481520" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-2-sbc-bright-object-protection">7.2 SBC Bright Object Protection</a> </li> <li id="pageTree_147481521" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-3-operating-modes">7.3 Operating Modes</a> </li> <li id="pageTree_147481522" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-4-patterns-and-dithering">7.4 Patterns and Dithering</a> </li> <li id="pageTree_147481523" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-5-a-road-map-for-optimizing-observations">7.5 A Road Map for Optimizing Observations</a> </li> <li id="pageTree_147481525" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-6-ccd-gain-selection">7.6 CCD Gain Selection</a> </li> <li id="pageTree_147481526" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-7-acs-apertures">7.7 ACS Apertures</a> </li> <li id="pageTree_147481532" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-8-specifying-orientation-on-the-sky">7.8 Specifying Orientation on the Sky</a> </li> <li id="pageTree_147481535" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-9-parallel-observations">7.9 Parallel Observations</a> </li> <li id="pageTree_147481536" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-7-observing-techniques/7-10-pointing-stability-for-moving-targets">7.10 Pointing Stability for Moving Targets</a> </li> </ul> </li> <li id="pageTree_147481537" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-8-overheads-and-orbit-time-determination">Chapter 8: Overheads and Orbit-Time Determination</a> <ul id="pagetreelvl3"> <li id="pageTree_147481538" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-8-overheads-and-orbit-time-determination/8-1-overview">8.1 Overview</a> </li> <li id="pageTree_147481539" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-8-overheads-and-orbit-time-determination/8-2-acs-exposure-overheads">8.2 ACS Exposure Overheads</a> </li> <li id="pageTree_147481540" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-8-overheads-and-orbit-time-determination/8-3-orbit-use-determination-examples">8.3 Orbit Use Determination Examples</a> </li> </ul> </li> <li id="pageTree_147481541" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-9-exposure-time-calculations">Chapter 9: Exposure-Time Calculations</a> <ul id="pagetreelvl3"> <li id="pageTree_147481542" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-9-exposure-time-calculations/9-1-overview">9.1 Overview</a> </li> <li id="pageTree_147481543" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-9-exposure-time-calculations/9-2-determining-count-rates-from-sensitivities">9.2 Determining Count Rates from Sensitivities</a> </li> <li id="pageTree_147481545" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-9-exposure-time-calculations/9-3-computing-exposure-times">9.3 Computing Exposure Times</a> </li> <li id="pageTree_147481546" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-9-exposure-time-calculations/9-4-detector-and-sky-backgrounds">9.4 Detector and Sky Backgrounds</a> </li> <li id="pageTree_147481549" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-9-exposure-time-calculations/9-5-extinction-correction">9.5 Extinction Correction</a> </li> <li id="pageTree_147481551" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-9-exposure-time-calculations/9-6-exposure-time-examples">9.6 Exposure-Time Examples</a> </li> <li id="pageTree_147481553" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-9-exposure-time-calculations/9-7-tabular-sky-backgrounds">9.7 Tabular Sky Backgrounds</a> </li> </ul> </li> <li id="pageTree_147481554" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-10-imaging-reference-material">Chapter 10: Imaging Reference Material</a> <ul id="pagetreelvl3"> <li id="pageTree_147481555" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-1-introduction">10.1 Introduction</a> </li> <li id="pageTree_147481556" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-2-using-the-information-in-this-chapter">10.2 Using the Information in this Chapter</a> </li> <li id="pageTree_147481557" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables">10.3 Throughputs and Correction Tables</a> <ul id="pagetreelvl4"> <li id="pageTree_147481558" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f435w">WFC F435W</a> </li> <li id="pageTree_147481562" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f475w">WFC F475W</a> </li> <li id="pageTree_147481566" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f502n">WFC F502N</a> </li> <li id="pageTree_147481570" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f550m">WFC F550M</a> </li> <li id="pageTree_147481574" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f555w">WFC F555W</a> </li> <li id="pageTree_147481578" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f606w">WFC F606W</a> </li> <li id="pageTree_147481582" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f625w">WFC F625W</a> </li> <li id="pageTree_147481586" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f658n">WFC F658N</a> </li> <li id="pageTree_147481590" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f660n">WFC F660N</a> </li> <li id="pageTree_147481594" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f775w">WFC F775W</a> </li> <li id="pageTree_147481598" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f814w">WFC F814W</a> </li> <li id="pageTree_147481602" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-f850lp">WFC F850LP</a> </li> <li id="pageTree_147481606" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-g800l">WFC G800L</a> </li> <li id="pageTree_147481610" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/wfc-clear">WFC CLEAR</a> </li> <li id="pageTree_147481614" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f220w">HRC F220W</a> </li> <li id="pageTree_147481618" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f250w">HRC F250W</a> </li> <li id="pageTree_147481622" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f330w">HRC F330W</a> </li> <li id="pageTree_147481626" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f344n">HRC F344N</a> </li> <li id="pageTree_147481630" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f435w">HRC F435W</a> </li> <li id="pageTree_147481635" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f475w">HRC F475W</a> </li> <li id="pageTree_147481639" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f502n">HRC F502N</a> </li> <li id="pageTree_147481643" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f550m">HRC F550M</a> </li> <li id="pageTree_147481647" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f555w">HRC F555W</a> </li> <li id="pageTree_147481651" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f606w">HRC F606W</a> </li> <li id="pageTree_147481655" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f625w">HRC F625W</a> </li> <li id="pageTree_147481659" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f658n">HRC F658N</a> </li> <li id="pageTree_147481663" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f660n">HRC F660N</a> </li> <li id="pageTree_147481667" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f775w">HRC F775W</a> </li> <li id="pageTree_147481671" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f814w">HRC F814W</a> </li> <li id="pageTree_147481675" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f850lp">HRC F850LP</a> </li> <li id="pageTree_147481679" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-f892n">HRC F892N</a> </li> <li id="pageTree_147481683" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-g800l">HRC G800L</a> </li> <li id="pageTree_147481687" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-pr200l">HRC PR200L</a> </li> <li id="pageTree_147481691" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/hrc-clear">HRC CLEAR</a> </li> <li id="pageTree_147481695" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/sbc-f115lp">SBC F115LP</a> </li> <li id="pageTree_147481699" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/sbc-f122m">SBC F122M</a> </li> <li id="pageTree_147481703" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/sbc-f125lp">SBC F125LP</a> </li> <li id="pageTree_147481707" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/sbc-f140lp">SBC F140LP</a> </li> <li id="pageTree_147481711" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/sbc-f150lp">SBC F150LP</a> </li> <li id="pageTree_147481715" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/sbc-f165lp">SBC F165LP</a> </li> <li id="pageTree_147481719" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/sbc-pr110l">SBC PR110L</a> </li> <li id="pageTree_147481723" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-3-throughputs-and-correction-tables/sbc-pr130l">SBC PR130L</a> </li> </ul> </li> <li id="pageTree_147481727" class=""> <span class="no-children">•</span> <a href="/acsihb/chapter-10-imaging-reference-material/10-4-geometric-distortion-in-acs">10.4 Geometric Distortion in ACS</a> </li> </ul> </li> <li id="pageTree_147481734" class=""> <span class="no-children">•</span> <a href="/acsihb/glossary">Glossary</a> </li> </ul> </li> </ul> </div><p></p> </div> </div> </div> </section> </div> <div class="row reverse labels"> </div> </div> <div class="sidenav col-12 col-dt-4 col-lg-3"> <a href="" class="close-sidebar hidden-dt hidden-lg"><span class="aui-icon aui-icon-small aui-iconfont-cross">Close Menu</span></a> <div class="flex-column"> <div class="sidebar-box"> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;" class="conf-macro output-block" data-hasbody="true" data-macro-name="sp-pagelayout"> <div style="display: table-cell; margin: 8px 0; padding: 0 10px; vertical-align: top; word-wrap: break-word; width: auto;"> <div style="display: block; overflow-x: auto;"> <h3 id="id-_table_of_contents-OnthisPage">On this Page</h3><p></p><div class="toc-macro client-side-toc-macro conf-macro output-block" data-cssliststyle="none" data-headerelements="H1,H2,H3,H4,H5,H6,H7" data-hasbody="false" data-macro-name="toc"></div><p></p> </div> </div> </div> </div> <div class="sidebar-box"> <nav> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;" class="conf-macro output-block" data-hasbody="true" data-macro-name="sp-pagelayout"> <div style="display: table-cell; margin: 8px 0; padding: 0 10px; vertical-align: top; word-wrap: break-word; width: auto;"> <div style="display: block; overflow-x: auto;"> <p></p><div class="pageTree-container conf-macro output-block" data-hasbody="false" data-macro-name="custom-page-tree"> <ul class="pageTree"> <li id="pageTree_148639929" class="pageTreeRoot"> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp"> HST Proposal Opportunities and Science Policies </a> <ul id="pagetreelvl2"> <li id="pageTree_148639939" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33">Hubble Space Telescope Call for Proposals for Cycle 33</a> <ul id="pagetreelvl3"> <li id="pageTree_148639949" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-new-and-important-features">HST New and Important Features</a> </li> <li id="pageTree_148639950" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-proposal-checklist">HST Proposal Checklist</a> </li> <li id="pageTree_148639951" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-anonymous-proposal-reviews">HST Anonymous Proposal Reviews</a> </li> <li id="pageTree_148639953" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-general-information-resources-documentation-and-tools">HST General Information, Resources, Documentation, and Tools</a> </li> <li id="pageTree_148639954" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-proposal-submission-policies">HST Proposal Submission Policies</a> </li> <li id="pageTree_148639955" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-proposal-categories">HST Proposal Categories</a> </li> <li id="pageTree_148639958" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-special-initiatives">HST Special Initiatives</a> </li> <li id="pageTree_148639961" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-observation-types">HST Observation Types</a> </li> <li id="pageTree_148639963" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-data-rights-and-duplications">HST Data Rights and Duplications</a> </li> <li id="pageTree_148639964" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-proposal-selection-procedures">HST Proposal Selection Procedures</a> </li> <li id="pageTree_148639966" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-guidelines-and-checklist-for-phase-i-proposal-preparation">HST Guidelines and Checklist for Phase I Proposal Preparation</a> </li> <li id="pageTree_148639967" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-filling-out-the-apt-phase-i-proposal-form">HST Filling Out the APT Phase I Proposal Form</a> </li> <li id="pageTree_148639968" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-preparation-of-the-pdf-attachment">HST Preparation of the PDF Attachment</a> </li> <li id="pageTree_148639986" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-proposal-implementation-and-execution">HST Proposal Implementation and Execution</a> </li> <li id="pageTree_148639987" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-grant-funding-and-budget-submissions">HST Grant Funding and Budget Submissions</a> </li> <li id="pageTree_148639990" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/appendix-a-contact-information">Appendix A: Contact Information</a> </li> <li id="pageTree_148639991" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/appendix-b-science-keywords">Appendix B: Science Keywords</a> </li> <li id="pageTree_148639992" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/appendix-c-glossary-of-acronyms-and-abbreviations">Appendix C: Glossary of Acronyms and Abbreviations</a> </li> <li id="pageTree_148639993" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/appendix-d-internet-links">Appendix D: Internet Links</a> </li> </ul> </li> <li id="pageTree_148639994" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33">The Hubble Space Telescope Primer for Cycle 33</a> <ul id="pagetreelvl3"> <li id="pageTree_148639995" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-resources-tools-and-other-documentation">HST Primer: Resources, Tools, and Other Documentation</a> </li> <li id="pageTree_148639996" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-system-overview">HST Primer: System Overview</a> </li> <li id="pageTree_148639999" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-orbital-constraints">HST Primer: Orbital Constraints</a> </li> <li id="pageTree_148640000" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-pointing-orientation-and-roll-constraints">HST Primer: Pointing, Orientation, and Roll Constraints</a> </li> <li id="pageTree_148640001" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-data-storage-and-transmission">HST Primer: Data Storage and Transmission</a> </li> <li id="pageTree_148640002" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-optical-performance-guiding-performance-and-observing-efficiency">HST Primer: Optical Performance, Guiding Performance, and Observing Efficiency</a> </li> <li id="pageTree_148640003" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-scientific-instruments-acs-wfc3-and-fgs">HST Primer: Scientific Instruments ACS, WFC3, and FGS</a> </li> <li id="pageTree_148640004" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-scientific-instrument-cos">HST Primer: Scientific Instrument COS</a> </li> <li id="pageTree_148640010" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-scientific-instrument-stis">HST Primer: Scientific Instrument STIS</a> </li> <li id="pageTree_148640011" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-additional-observing-modes">HST Primer: Additional Observing Modes</a> </li> <li id="pageTree_148640012" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-scientific-instrument-comparisons">HST Primer: Scientific Instrument Comparisons</a> </li> <li id="pageTree_148640019" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-observing-considerations">HST Primer: Observing Considerations</a> </li> <li id="pageTree_148640020" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-orbit-calculation-overview">HST Primer: Orbit Calculation Overview</a> </li> <li id="pageTree_148640021" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-orbital-visibility-acquisition-times-and-overheads">HST Primer: Orbital Visibility, Acquisition Times, and Overheads</a> </li> <li id="pageTree_148640022" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-orbit-calculation-examples">HST Primer: Orbit Calculation Examples</a> </li> <li id="pageTree_148640023" class=""> <span class="no-children">•</span> <a href="/hsp/the-hubble-space-telescope-primer-for-cycle-33/hst-primer-data-processing-and-the-hst-data-archive">HST Primer: Data Processing and the HST Data Archive</a> </li> </ul> </li> <li id="pageTree_148640024" class=""> <span class="no-children">•</span> <a href="/hsp/hst-phase-i-proposal-roadmap">HST Phase I Proposal Roadmap</a> </li> <li id="pageTree_148640028" class=""> <span class="no-children">•</span> <a href="/hsp/hst-phase-ii-proposal-roadmap">HST Phase II Proposal Roadmap</a> </li> <li id="pageTree_148640029" class=""> <span class="no-children">•</span> <a href="/hsp/hst-cycle-32-director-s-discretionary-time-submission">HST Cycle 32 Director's Discretionary Time Submission</a> </li> <li id="pageTree_148640030" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/hst-general-science-policies">HST General Science Policies</a> <ul id="pagetreelvl3"> <li id="pageTree_148640031" class=""> <span class="no-children">•</span> <a href="/hsp/hst-general-science-policies/targets-of-opportunity-and-director-s-discretionary-programs">Targets of Opportunity and Director's Discretionary Programs</a> </li> <li id="pageTree_148640032" class=""> <span class="no-children">•</span> <a href="/hsp/hst-general-science-policies/review-and-implementation-of-target-of-opportunity-and-directors-discretionary-time-observations">Review and Implementation of Target of Opportunity and Director’s Discretionary Time Observations</a> </li> <li id="pageTree_148640035" class=""> <span class="no-children">•</span> <a href="/hsp/hst-general-science-policies/telescope-time-review-board">Telescope Time Review Board</a> </li> <li id="pageTree_148640036" class=""> <span class="no-children">•</span> <a href="/hsp/hst-general-science-policies/hst-duplication-policy">HST Duplication Policy</a> </li> <li id="pageTree_148640037" class=""> <span class="no-children">•</span> <a href="/hsp/hst-general-science-policies/nasa-hubble-operational-paradigm-change-review-and-hubble-observations">NASA Hubble Operational Paradigm Change Review and Hubble Observations</a> </li> <li id="pageTree_148640038" class=""> <span class="no-children">•</span> <a href="/hsp/hst-general-science-policies/reduced-gyro-mode-tips-and-resources">Reduced Gyro Mode Tips and Resources</a> </li> </ul> </li> <li id="pageTree_148640039" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information">Hubble Space Telescope Science Policies Group and Peer Review Information</a> <ul id="pagetreelvl3"> <li id="pageTree_148640076" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/hst-peer-review-guide">HST Peer Review Guide</a> <ul id="pagetreelvl4"> <li id="pageTree_148640078" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/hst-peer-review-guide/discussion-panelists">Discussion Panelists</a> </li> <li id="pageTree_148640080" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/hst-peer-review-guide/external-panelists">External Panelists</a> </li> <li id="pageTree_148640082" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/hst-peer-review-guide/executive-committee-panelists">Executive Committee Panelists</a> </li> <li id="pageTree_148640085" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/hst-peer-review-guide/panel-support-scientists">Panel Support Scientists</a> </li> </ul> </li> <li id="pageTree_148640087" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started">General Info & Getting Started</a> <ul id="pagetreelvl4"> <li id="pageTree_148640089" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started/code-of-conduct">Code of Conduct</a> </li> <li id="pageTree_148640090" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started/confidentiality">Confidentiality</a> </li> <li id="pageTree_148640091" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started/conflicts-of-interest">Conflicts of Interest</a> </li> <li id="pageTree_148640093" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started/hubble-and-its-instruments">Hubble and its Instruments</a> </li> <li id="pageTree_148640107" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started/proposal-types-sizes-and-science-areas">Proposal Types, Sizes and Science Areas</a> </li> <li id="pageTree_148640109" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started/hst-duplication-policies-for-the-tac">HST Duplication Policies for the TAC</a> </li> <li id="pageTree_148640110" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started/tips-for-a-smooth-review">Tips for a Smooth Review</a> </li> <li id="pageTree_148640112" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started/who-to-contact-for-help">Who to Contact for Help</a> </li> <li id="pageTree_148640114" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/general-info-getting-started/orientation-materials">Orientation Materials</a> </li> </ul> </li> <li id="pageTree_148640171" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments">Reviews, Grades & Comments</a> <ul id="pagetreelvl4"> <li id="pageTree_148640173" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide">SPIRIT WebReviewer Tool Guide</a> <ul id="pagetreelvl5"> <li id="pageTree_148640175" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/application-sign-in">Application Sign-In</a> </li> <li id="pageTree_148640178" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/viewing-panel-assignments-and-resources">Viewing Panel Assignments and Resources</a> </li> <li id="pageTree_148640186" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/navigating-and-viewing-panel-proposals">Navigating and Viewing Panel Proposals</a> </li> <li id="pageTree_148640192" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/grading-by-worksheet">Grading by Worksheet</a> </li> <li id="pageTree_148640195" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/entering-a-proposal-grade">Entering A Proposal Grade</a> </li> <li id="pageTree_148640198" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/entering-a-proposal-review">Entering A Proposal Review</a> </li> <li id="pageTree_148640203" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/entering-private-notes">Entering Private Notes</a> </li> <li id="pageTree_148640206" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/entering-shared-remarks">Entering Shared Remarks</a> </li> <li id="pageTree_148640210" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/submitting-a-final-review">Submitting A Final Review</a> </li> <li id="pageTree_148640214" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/viewing-final-ranking">Viewing Final Ranking</a> </li> <li id="pageTree_148640218" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/spirit-webreviewer-tool-guide/viewing-spirit-notifications">Viewing SPIRIT Notifications</a> </li> </ul> </li> <li id="pageTree_148640226" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/dual-anonymous-proposals-guide-for-reviewers">Dual Anonymous Proposals Guide for Reviewers</a> </li> <li id="pageTree_148640227" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/selection-criteria-and-scoring-system">Selection Criteria and Scoring System</a> </li> <li id="pageTree_148640229" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/reviews-grades-comments/proposal-feedback-comments">Proposal Feedback Comments</a> </li> </ul> </li> <li id="pageTree_148640230" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings">Panel Meetings</a> <ul id="pagetreelvl4"> <li id="pageTree_148640232" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/webex-and-slack-guidelines">Webex and Slack Guidelines</a> </li> <li id="pageTree_148640234" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/primary-secondary-reviewers-graders">Primary / Secondary Reviewers & Graders</a> </li> <li id="pageTree_148640235" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/triage-process-discussion-list">Triage Process & Discussion List</a> </li> <li id="pageTree_148640237" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/preparing-for-the-panel-meeting">Preparing for the Panel Meeting</a> </li> <li id="pageTree_148640238" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/guidelines-for-panel-chairs-and-vice-chairs">Guidelines for Panel Chairs and Vice Chairs</a> </li> <li id="pageTree_148640240" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/virtual-panel-meetings">Virtual Panel Meetings</a> </li> <li id="pageTree_148640241" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/final-ranking">Final Ranking</a> </li> <li id="pageTree_148640246" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/large-treasury-legacy-proposals">Large, Treasury, & Legacy Proposals</a> </li> <li id="pageTree_148640247" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/executive-committee">Executive Committee</a> </li> <li id="pageTree_148640248" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/panel-meetings/executive-committee-expert-reviews">Executive Committee Expert Reviews</a> </li> </ul> </li> <li id="pageTree_148640249" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/stsci-staff">STScI Staff</a> <ul id="pagetreelvl4"> <li id="pageTree_148640250" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/stsci-staff/role-of-panel-support-scientists">Role of Panel Support Scientists</a> </li> <li id="pageTree_148640251" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/stsci-staff/role-of-levelers">Role of Levelers</a> </li> <li id="pageTree_148640252" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/stsci-staff/panel-advisors-and-observers">Panel Advisors and Observers</a> </li> <li id="pageTree_148640253" class=""> <span class="no-children">•</span> <a href="/hsp/hubble-space-telescope-science-policies-group-and-peer-review-information/stsci-staff/science-policies-group-spg-members">Science Policies Group (SPG) Members</a> </li> </ul> </li> </ul> </li> <li id="pageTree_148640254" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/past-hst-proposal-opportunities">Past HST Proposal Opportunities</a> <ul id="pagetreelvl3"> <li id="pageTree_148640258" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hst-cycle-31-mid-cycle-time-submission">HST Cycle 31 Mid-Cycle Time Submission</a> </li> <li id="pageTree_148640259" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27">Hubble Space Telescope Call for Proposals for Cycle 27</a> <ul id="pagetreelvl4"> <li id="pageTree_148640261" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-new-and-important-features">HST Cycle 27 New and Important Features</a> </li> <li id="pageTree_148640262" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-anonymous-proposal-reviews">HST Cycle 27 Anonymous Proposal Reviews</a> </li> <li id="pageTree_148640263" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-general-information-resources-documentation-and-tools">HST Cycle 27 General Information, Resources, Documentation, and Tools</a> </li> <li id="pageTree_148640264" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-proposal-submission-policies">HST Cycle 27 Proposal Submission Policies</a> </li> <li id="pageTree_148640265" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-proposal-categories">HST Cycle 27 Proposal Categories</a> </li> <li id="pageTree_148640268" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-special-initiatives">HST Cycle 27 Special Initiatives</a> </li> <li id="pageTree_148640270" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-observation-types-and-special-requirements">HST Cycle 27 Observation Types and Special Requirements</a> </li> <li id="pageTree_148640271" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-data-rights-and-duplications">HST Cycle 27 Data Rights and Duplications</a> </li> <li id="pageTree_148640272" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-proposal-selection-procedures">HST Cycle 27 Proposal Selection Procedures</a> </li> <li id="pageTree_148640274" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-guidelines-and-checklist-for-phase-i-proposal-preparation">HST Cycle 27 Guidelines and Checklist for Phase I Proposal Preparation</a> </li> <li id="pageTree_148640275" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-filling-out-the-apt-proposal-form">HST Cycle 27 Filling Out the APT Proposal Form</a> </li> <li id="pageTree_148640276" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-preparation-of-the-pdf-attachment">HST Cycle 27 Preparation of the PDF Attachment</a> </li> <li id="pageTree_148640290" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-proposal-implementation-and-execution">HST Cycle 27 Proposal Implementation and Execution</a> </li> <li id="pageTree_148640291" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-grant-funding-and-budget-submissions">HST Cycle 27 Grant Funding and Budget Submissions</a> </li> <li id="pageTree_148640294" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-appendix-a-contact-information">HST Cycle 27 Appendix A: Contact Information</a> </li> <li id="pageTree_148640295" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-appendix-b-scientific-keywords">HST Cycle 27 Appendix B: Scientific Keywords</a> </li> <li id="pageTree_148640296" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-appendix-c-glossary-of-acronyms-and-abbreviations">HST Cycle 27 Appendix C: Glossary of Acronyms and Abbreviations</a> </li> <li id="pageTree_148640297" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-appendix-d-internet-links">HST Cycle 27 Appendix D: Internet Links</a> </li> <li id="pageTree_148640298" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-27/hst-cycle-27-mid-cycle-time-submission">HST Cycle 27 Mid-Cycle Time Submission</a> </li> </ul> </li> <li id="pageTree_148640299" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27">The Hubble Space Telescope Primer for Cycle 27</a> <ul id="pagetreelvl4"> <li id="pageTree_148640300" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-resources-tools-and-other-documentation">HST Cycle 27 Primer Resources, Tools, and Other Documentation</a> </li> <li id="pageTree_148640301" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-system-overview">HST Cycle 27 Primer System Overview</a> </li> <li id="pageTree_148640304" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-orbital-constraints">HST Cycle 27 Primer Orbital Constraints</a> </li> <li id="pageTree_148640305" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-pointing-orientation-and-roll-constraints">HST Cycle 27 Primer Pointing, Orientation, and Roll Constraints</a> </li> <li id="pageTree_148640306" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-data-storage-and-transmission">HST Cycle 27 Primer Data Storage and Transmission</a> </li> <li id="pageTree_148640307" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-optical-performance-guiding-performance-and-observing-efficiency">HST Cycle 27 Primer Optical Performance, Guiding Performance, and Observing Efficiency</a> </li> <li id="pageTree_148640308" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-scientific-instruments-acs-wfc3-and-fgs">HST Cycle 27 Primer Scientific Instruments ACS, WFC3, and FGS</a> </li> <li id="pageTree_148640309" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-scientific-instrument-cos">HST Cycle 27 Primer Scientific Instrument COS</a> </li> <li id="pageTree_148640314" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-scientific-instrument-stis">HST Cycle 27 Primer Scientific Instrument STIS</a> </li> <li id="pageTree_148640315" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-additional-observing-modes">HST Cycle 27 Primer Additional Observing Modes</a> </li> <li id="pageTree_148640316" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-scientific-instrument-comparisons">HST Cycle 27 Primer Scientific Instrument Comparisons</a> </li> <li id="pageTree_148640323" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-observing-considerations">HST Cycle 27 Primer Observing Considerations</a> </li> <li id="pageTree_148640324" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-orbit-calculation-overview">HST Cycle 27 Primer Orbit Calculation Overview</a> </li> <li id="pageTree_148640325" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-orbital-visibility-acquisition-times-and-overheads">HST Cycle 27 Primer Orbital Visibility, Acquisition Times, and Overheads</a> </li> <li id="pageTree_148640326" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-orbit-calculation-examples">HST Cycle 27 Primer Orbit Calculation Examples</a> </li> <li id="pageTree_148640327" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-27/hst-cycle-27-primer-data-processing-and-the-hst-data-archive">HST Cycle 27 Primer Data Processing and the HST Data Archive</a> </li> </ul> </li> <li id="pageTree_148640328" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26">Hubble Space Telescope Call for Proposals for Cycle 26</a> <ul id="pagetreelvl4"> <li id="pageTree_148640329" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-new-and-important-features">HST Cycle 26 New and Important Features</a> </li> <li id="pageTree_148640330" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-anonymous-proposal-reviews">HST Cycle 26 Anonymous Proposal Reviews</a> </li> <li id="pageTree_148640331" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-general-information-resources-documentation-and-tools">HST Cycle 26 General Information, Resources, Documentation, and Tools</a> </li> <li id="pageTree_148640332" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-proposal-submission-policies">HST Cycle 26 Proposal Submission Policies</a> </li> <li id="pageTree_148640333" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-proposal-categories">HST Cycle 26 Proposal Categories</a> </li> <li id="pageTree_148640335" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-special-initiatives">HST Cycle 26 Special Initiatives</a> </li> <li id="pageTree_148640337" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-observation-types-and-special-requirements">HST Cycle 26 Observation Types and Special Requirements</a> </li> <li id="pageTree_148640338" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-data-rights-and-duplications">HST Cycle 26 Data Rights and Duplications</a> </li> <li id="pageTree_148640339" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-proposal-selection-procedures">HST Cycle 26 Proposal Selection Procedures</a> </li> <li id="pageTree_148640341" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-guidelines-and-checklist-for-phase-i-proposal-preparation">HST Cycle 26 Guidelines and Checklist for Phase I Proposal Preparation</a> </li> <li id="pageTree_148640342" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-filling-out-the-apt-proposal-form">HST Cycle 26 Filling Out the APT Proposal Form</a> </li> <li id="pageTree_148640343" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-preparation-of-the-pdf-attachment">HST Cycle 26 Preparation of the PDF Attachment</a> </li> <li id="pageTree_148640357" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-proposal-implementation-and-execution">HST Cycle 26 Proposal Implementation and Execution</a> </li> <li id="pageTree_148640358" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-grant-funding-and-budget-submissions">HST Cycle 26 Grant Funding and Budget Submissions</a> </li> <li id="pageTree_148640360" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-appendix-a-contact-information">HST Cycle 26 Appendix A: Contact Information</a> </li> <li id="pageTree_148640361" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-appendix-b-scientific-keywords">HST Cycle 26 Appendix B: Scientific Keywords</a> </li> <li id="pageTree_148640362" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-appendix-c-glossary-of-acronyms-and-abbreviations">HST Cycle 26 Appendix C: Glossary of Acronyms and Abbreviations</a> </li> <li id="pageTree_148640363" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/hubble-space-telescope-call-for-proposals-for-cycle-26/hst-cycle-26-appendix-d-internet-links">HST Cycle 26 Appendix D: Internet Links</a> </li> </ul> </li> <li id="pageTree_148640364" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-26">The Hubble Space Telescope Primer for Cycle 26</a> <ul id="pagetreelvl4"> <li id="pageTree_148640365" class=""> <span 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href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-26/hst-cycle-26-primer-scientific-instrument-comparisons">HST Cycle 26 Primer Scientific Instrument Comparisons</a> </li> <li id="pageTree_148640388" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-26/hst-cycle-26-primer-observing-considerations">HST Cycle 26 Primer Observing Considerations</a> </li> <li id="pageTree_148640389" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-26/hst-cycle-26-primer-orbit-calculation-overview">HST Cycle 26 Primer Orbit Calculation Overview</a> </li> <li id="pageTree_148640390" class=""> <span class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-26/hst-cycle-26-primer-orbital-visibility-acquisition-times-and-overheads">HST Cycle 26 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