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Hubble Space Telescope Call for Proposals for Cycle 33 - 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>STScI solicits proposals for HST Observing, Archival, and Theoretical Research. The full details are made available through two documents, the Call for Proposals, and the HST Primer. Downloadable PDF collections of these articles are provided as a courtesy, made available and updated when feasible. <em><strong>The online documentation is the authority</strong></em>, and will be updated with the latest information.</p><hr><p style="text-align: center;"></p><div class="toc-macro client-side-toc-macro non-printable conf-macro output-block" data-structure="flat" data-headerelements="H1,H2,H3,H4,H5,H6,H7" data-hasbody="false" data-macro-name="toc"></div><p></p><p><br><span class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt"></span></p><hr><h1 id="HubbleSpaceTelescopeCallforProposalsforCycle33-LateBreakingNews">Late Breaking News</h1><ul><li><strong><span style="text-decoration: none;">March 25, 2025:</span></strong><ul><li><strong><span style="text-decoration: none;">New COS Lifetime Usage Policy: </span></strong><span style="text-decoration: none;">Starting in Cycle 33, COS FUV programs will be limited to a maximum of 2% lifetime usage per Lifetime Position (LP), with usage beyond 1% requiring justification in the Phase I proposal. Proposers should consult the <a rel="nofollow" class="external-link" href="https://www.stsci.edu/contents/news/cos-stans/march-2025-stan">updated lifetime usage table</a></span><span style="text-decoration: none;"> to determine whether their proposed observations approach or exceed the usage limits.</span></li></ul></li><li><strong><span style="text-decoration: none;">February 3, 2025:</span></strong><ul><li><strong><span style="text-decoration: none;">New COS Lifetime Positions: </span></strong><span style="text-decoration: none;">Starting in Cycle 33, FUV gratings G130M utilizing cenwaves 1055, 1096, 1222, and 1291 and G160M utilizing all cenwaves will move to use new lifetime positions (LPs). Similar to previous moves, these LPs have different overheads and spectral resolution. More information is available in the <a rel="nofollow" class="external-link" href="https://www.stsci.edu/contents/news/cos-stans/march-2025-stan">March 2025 STAN</a>.</span></li></ul></li><li><strong><span style="text-decoration: none;">January 9, 2025:</span></strong><ul><li><strong>APT: </strong><a rel="nofollow" class="external-link" href="https://www.stsci.edu/scientific-community/software/astronomers-proposal-tool-apt/">APT 2024.7.1</a><span> </span>is now available. Cycle 33 proposers should use this version to submit their proposals. Submissions started in earlier versions can be transferred to 2024.7.1.</li></ul></li></ul><p>See also <a data-macro-name="sp-nobody-link" href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-new-and-important-features" class="conf-macro output-inline" data-hasbody="false">HST New and Important Features</a>.</p><p><br></p><p></p><h1 id="HubbleSpaceTelescopeCallforProposalsforCycle33-Welcome">Welcome</h1><p>We invite scientists to participate in <span class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">Cycle 33</span> of the Hubble Space Telescope (HST). The telescope and its instruments were built under the auspices of the National Aeronautics and Space Administration (NASA) and the European Space Agency (ESA). Management of HST’s scientific program is carried out by the Space Telescope Science Institute (STScI). We anticipate allocating up to <span class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">2600</span> orbits in this cycle, including approximately <span class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">1300</span> orbits for Very Small and Small Programs, <span class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">650</span> orbits for Medium Programs, and <span class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">650</span> for Large and Treasury Programs. An additional <span class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">1000</span> Snapshot observations and <span class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">500</span> <span style="letter-spacing: 0.0px;">Pure-Parallel observations may be allocated. </span>Abstracts of previously accepted programs can be found on the <a rel="nofollow" class="external-link" href="http://archive.stsci.edu/hst/catalogs.html">HST proposal catalogs webpage</a>.</p><p>This document establishes the goals, requirements, and policies for General Observer (GO) and Archival Research (AR) programs in Cycle 33. The table of contents for the web version of this document is on the right side of the page, and links there can take you to any page from any other page (click the arrow to expand the entire table of contents under "Hubble Space Telescope Call for Proposals for Cycle 33"). The links at the top of each page correspond to sections within that given page.</p><h1 id="HubbleSpaceTelescopeCallforProposalsforCycle33-calendarProposingCalendarandDeadlines"><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="sp-anchor"><span class="confluence-anchor-link" id="HubbleSpaceTelescopeCallforProposalsforCycle33-calendar"></span><span id="calendar"></span></span>Proposing Calendar and Deadlines</h1><p>Cycle 33 Dates: <strong class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">November 1, 2025 - October 31, 2026</strong><br></p><p>Cycle 33 Phase I proposal deadline: <strong class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">Thursday, April 10, 2025 at 8:00pm EDT</strong><br></p><p>Cycle 33 Peer Review meeting: <strong class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">June 23 - July 3, 2025</strong><br></p><p>Cycle 33 Phase II proposal deadline: <strong class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">anticipated August 14, 2025 at 5:00pm EDT</strong><br></p><p>Cycle 33 Budget submission deadline: <strong class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt">August 14, 2025 at 5:00pm EDT</strong><br></p><p>Notification of the outcome of the Phase I selection process will be sent to all proposers in <strong>late July 2025</strong>.</p><h1 id="HubbleSpaceTelescopeCallforProposalsforCycle33-What'sNewforCycle33">What's New for Cycle 33</h1><p>See <a data-macro-name="sp-nobody-link" href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-new-and-important-features" class="conf-macro output-inline" data-hasbody="false">HST New and Important Features</a>.</p><h1 id="HubbleSpaceTelescopeCallforProposalsforCycle33-WheretoGetHelp">Where to Get Help</h1><ul><li>Read this <a data-macro-name="sp-plaintextbody-link" href="" class="conf-macro output-inline" data-hasbody="true">Call for Proposals</a> and <a data-macro-name="sp-nobody-link" href="/hsp/the-hubble-space-telescope-primer-for-cycle-33" class="conf-macro output-inline" data-hasbody="false">The Hubble Space Telescope Primer for Cycle 33</a>.</li><li>Visit the STScI <a data-macro-name="sp-nobody-link" href="/hsp/hst-phase-i-proposal-roadmap" class="conf-macro output-inline" data-hasbody="false">HST Phase I Proposal Roadmap</a> and the <a data-macro-name="sp-nobody-link" href="/hsp/hst-phase-ii-proposal-roadmap" class="conf-macro output-inline" data-hasbody="false">HST Phase II Proposal Roadmap</a>.</li><li>Visit STScI’s website at <a rel="nofollow" class="external-link" href="http://www.stsci.edu/">http://www.stsci.edu/</a>.</li><li>Register (or review/check) a <a rel="nofollow" class="external-link" href="https://myaccount.stsci.edu">STScI Single Sign-On (SSO) Account</a>.</li><li>Contact the STScI HST Help Desk (web: <a rel="nofollow" class="external-link" href="https://hsthelp.stsci.edu/">https://hsthelp.stsci.edu</a>). </li></ul><p><br><span class="conf-macro output-inline" data-hasbody="true" data-macro-name="multiexcerpt"></span></p><h1 class="BodyNoIndent" id="HubbleSpaceTelescopeCallforProposalsforCycle33-Who'sResponsible">Who's Responsible</h1><p class="BodyNoIndent">The HST Call for Proposals and related materials for Cycle 33 were edited by Molly Peeples (Hubble Science Policies Deputy). The Associate Director for Science, Mercedes López-Morales, and the Science Mission Office (SMO) at STScI are responsible for the oversight of the HST science program selection process. SMO members include Marc Postman (SMO Mission Head), Laura Watkins (SMO Deputy Mission Head), Claus Leitherer (Hubble Science Policies Lead), Katey Alatalo, Daniel D'Orazio, Andrew Fruchter, Amy Jones, Susan Kassin, Rebecca Levy, Amaya Moro-Martin, Nikolay Nikolov, Jamila Pegues, Linda Smith, and Technical Manager Aleksandra Hamanowicz. <span style="color: rgb(23,43,77);">Neill Reid (Multi-Mission Project Scientist) participates in an advisory capacity.</span></p><p></p><h1 id="HubbleSpaceTelescopeCallforProposalsforCycle33-DownloadthePDF">Download the PDF</h1><hr><p>This PDF is provided as a courtesy, made available and updated when feasible. <em><strong>The online documentation is the authority</strong></em>, and will be updated with the latest information.</p><p><span class="confluence-embedded-file-wrapper conf-macro output-inline" data-hasbody="false" data-macro-name="view-file"><a data-can-edit="false" data-linked-resource-default-alias="HST_CfP_Cycle33.pdf" data-file-src="/download/attachments/148639939/HST_CfP_Cycle33.pdf?version=1&modificationDate=1734556073953&api=v2" data-nice-type="PDF Document" data-linked-resource-id="148639940" draggable="false" data-linked-resource-container-id="148639939" data-mime-type="application/pdf" data-has-thumbnail="true" data-linked-resource-version="1" href="/hsp/files/148639939/148639940/1/1734556073953/HST_CfP_Cycle33.pdf" class="confluence-embedded-file" data-linked-resource-type="attachment" aria-label="HST_CfP_Cycle33.pdf"><img alt="" draggable="false" src="/rest/documentConversion/latest/conversion/thumbnail/148639940/1" height="250"></a></span></p><p><br></p><hr><p style="text-align: right;"><em>Next: <a data-macro-name="sp-nobody-link" href="/hsp/hubble-space-telescope-call-for-proposals-for-cycle-33/hst-new-and-important-features" class="conf-macro output-inline" data-hasbody="false">HST New and Important Features</a></em></p><p><br></p><p><br></p> </div> </div> </div> </section> </div> <div 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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 class="no-children">•</span> <a href="/hsp/past-hst-proposal-opportunities/the-hubble-space-telescope-primer-for-cycle-26/hst-cycle-26-primer-resources-tools-and-other-documentation">HST Cycle 26 Primer Resources, Tools, and Other Documentation</a> </li> <li id="pageTree_148640366" 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-system-overview">HST Cycle 26 Primer System Overview</a> </li> <li id="pageTree_148640369" 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-constraints">HST Cycle 26 Primer Orbital Constraints</a> </li> <li id="pageTree_148640370" 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-pointing-orientation-and-roll-constraints">HST Cycle 26 Primer Pointing, Orientation, and Roll Constraints</a> </li> <li id="pageTree_148640371" 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-data-storage-and-transmission">HST Cycle 26 Primer Data Storage and Transmission</a> </li> <li id="pageTree_148640372" 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-optical-performance-guiding-performance-and-observing-efficiency">HST Cycle 26 Primer Optical Performance, Guiding Performance, and Observing Efficiency</a> </li> <li id="pageTree_148640373" 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-scientific-instruments-acs-wfc3-and-fgs">HST Cycle 26 Primer Scientific Instruments ACS, WFC3, and FGS</a> </li> <li id="pageTree_148640374" 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-scientific-instrument-cos">HST Cycle 26 Primer Scientific Instrument COS</a> </li> <li id="pageTree_148640379" 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-scientific-instrument-stis">HST Cycle 26 Primer Scientific Instrument STIS</a> </li> <li id="pageTree_148640380" 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-additional-observing-modes">HST Cycle 26 Primer Additional Observing Modes</a> </li> <li id="pageTree_148640381" 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-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 Primer Orbital Visibility, Acquisition Times, and Overheads</a> </li> <li id="pageTree_148640391" 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-examples">HST Cycle 26 Primer Orbit Calculation Examples</a> </li> <li id="pageTree_148640392" 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-data-processing-and-the-hst-data-archive">HST Cycle 26 Primer Data Processing and the HST Data Archive</a> </li> </ul> </li> </ul> </li> <li id="pageTree_148640393" class=""> <span class="no-children">•</span> <a href="/hsp/hst-mid-cycle-approved-programs">HST Mid-Cycle Approved Programs</a> </li> <li id="pageTree_148640394" class=""> <span class="no-children">•</span> <a href="/hsp/call-for-cycle-32-bridge-programs">Call for Cycle 32 Bridge Programs</a> </li> </ul> </li> </ul> </div><p></p> </div> </div> </div> </nav> </div> </div> </div> <div class="side-nav-mobile hidden-dt hidden-lg"> <a class="sidebar-menu" href=""> <span class="aui-icon aui-icon-small aui-iconfont-menu"> Menu </span> Navigation </a> </div> </div> <footer class="col-12 col-tb-12 col-dt-12 col-lg-12"> <div> <a href="https://www.stsci.edu/privacy">Privacy Policy</a> </div> <div class="row attributionLine"> 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