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Glossary and Acronyms - Roman User Documentation
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class="no-children">•</span> <a href="/roman-instruments-home/wfi-imaging-mode-user-guide/observing-with-the-wfi-in-imaging-mode/wfi-dithering">WFI Dithering</a> </li> <li id="pageTree_159122766" class=""> <span class="no-children">•</span> <a href="/roman-instruments-home/wfi-imaging-mode-user-guide/observing-with-the-wfi-in-imaging-mode/wfi-multiaccum-tables">WFI MultiAccum Tables</a> </li> </ul> </li> </ul> </li> <li id="pageTree_78840608" class=""> <span class="no-children">•</span> <a href="/roman-instruments-home/wfi-spectroscopic-mode-user-guide">WFI Spectroscopic Mode User Guide</a> </li> </ul> </li> </ul> </div><p></p> </div> </div> </div> <div class="nav-section-header"> Data </div> <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_78840611" class="pageTreeRoot"> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/data-handbook-home"> Data Handbook Home </a> <ul class="open" id="pagetreelvl2"> <li id="pageTree_78840612" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/introduction-to-wfi-imaging-data">Introduction to WFI Imaging Data</a> </li> <li id="pageTree_78840613" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/data-handbook-home/wfi-data-format">WFI Data Format</a> <ul id="pagetreelvl3"> <li id="pageTree_131893096" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/wfi-data-format/introduction-to-asdf">Introduction to ASDF</a> </li> <li id="pageTree_131893097" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/wfi-data-format/coordinate-systems">Coordinate Systems</a> </li> <li id="pageTree_78840615" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/data-handbook-home/wfi-data-format/data-levels-and-products">Data Levels and Products</a> <ul id="pagetreelvl4"> <li id="pageTree_131893104" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/wfi-data-format/data-levels-and-products/associations">Associations</a> </li> </ul> </li> <li id="pageTree_131893105" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/wfi-data-format/skymap-tessellation">Skymap Tessellation</a> </li> </ul> </li> <li id="pageTree_78840617" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/data-handbook-home/roman-stsci-data-pipelines">Roman STScI Data Pipelines</a> <ul id="pagetreelvl3"> <li id="pageTree_131893135" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/roman-stsci-data-pipelines/exposure-level-pipeline">Exposure Level Pipeline</a> </li> <li id="pageTree_131893136" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/roman-stsci-data-pipelines/mosaic-level-pipeline">Mosaic Level Pipeline</a> </li> </ul> </li> <li id="pageTree_78840618" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/data-handbook-home/accessing-wfi-data">Accessing WFI Data</a> <ul id="pagetreelvl3"> <li id="pageTree_78840619" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/accessing-wfi-data/crds-for-reference-files">CRDS for Reference Files</a> </li> <li id="pageTree_131893139" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/data-handbook-home/accessing-wfi-data/the-roman-archive-in-mast">The Roman Archive in MAST</a> <ul id="pagetreelvl4"> <li id="pageTree_131893140" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/accessing-wfi-data/the-roman-archive-in-mast/cloud-access">Cloud Access</a> </li> </ul> </li> </ul> </li> <li id="pageTree_159122808" class=""> <span class="no-children">•</span> <a href="/data-handbook-home/roman-research-nexus">Roman Research Nexus</a> </li> </ul> </li> </ul> </div><p></p> </div> </div> </div> <div class="nav-section-header"> Simulation Tools </div> <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_49152019" class="pageTreeRoot"> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/simulation-tools-handbook-home"> Simulation Tools Handbook Home </a> <ul class="open" id="pagetreelvl2"> <li id="pageTree_78841283" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/what-roman-simulation-tool-should-i-use">What Roman Simulation Tool Should I Use?</a> </li> <li id="pageTree_49152281" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/simulation-tools-handbook-home/stpsf-for-roman">STPSF for Roman</a> <ul id="pagetreelvl3"> <li id="pageTree_49152285" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/stpsf-for-roman/overview-of-stpsf">Overview of STPSF</a> </li> <li id="pageTree_49152296" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/stpsf-for-roman/stpsf-tutorials">STPSF Tutorials</a> </li> <li id="pageTree_49152297" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/stpsf-for-roman/caveats-of-using-stpsf-for-roman">Caveats of using STPSF for Roman</a> </li> </ul> </li> <li id="pageTree_49152298" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/simulation-tools-handbook-home/stips-space-telescope-imaging-product-simulator">STIPS - Space Telescope Imaging Product Simulator</a> <ul id="pagetreelvl3"> <li id="pageTree_49152302" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/stips-space-telescope-imaging-product-simulator/overview-of-stips">Overview of STIPS</a> </li> <li id="pageTree_49152303" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/stips-space-telescope-imaging-product-simulator/stips-tutorials">STIPS Tutorials</a> </li> <li id="pageTree_49152306" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/stips-space-telescope-imaging-product-simulator/caveats-of-using-stips-for-roman">Caveats of using STIPS for Roman</a> </li> </ul> </li> <li id="pageTree_118325629" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/simulation-tools-handbook-home/roman-wfi-exposure-time-calculator">Roman WFI Exposure Time Calculator</a> <ul id="pagetreelvl3"> <li id="pageTree_49152308" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/simulation-tools-handbook-home/roman-wfi-exposure-time-calculator/pandeia-for-roman">Pandeia for Roman</a> <ul id="pagetreelvl4"> <li id="pageTree_49152310" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/roman-wfi-exposure-time-calculator/pandeia-for-roman/overview-of-pandeia">Overview of Pandeia</a> </li> <li id="pageTree_49152311" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/roman-wfi-exposure-time-calculator/pandeia-for-roman/pandeia-tutorials">Pandeia Tutorials</a> </li> <li id="pageTree_49152312" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/roman-wfi-exposure-time-calculator/pandeia-for-roman/caveats-of-using-pandeia-for-roman">Caveats of using Pandeia for Roman</a> </li> </ul> </li> <li id="pageTree_131892607" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/simulation-tools-handbook-home/roman-wfi-exposure-time-calculator/wfi-etc-web-interface">WFI ETC Web Interface</a> <ul id="pagetreelvl4"> <li id="pageTree_118325631" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/roman-wfi-exposure-time-calculator/wfi-etc-web-interface/roman-etc-interface-help">Roman ETC Interface Help</a> </li> </ul> </li> <li id="pageTree_118325640" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/roman-wfi-exposure-time-calculator/roman-interactive-sensitivity-tool">Roman Interactive Sensitivity Tool</a> </li> </ul> </li> <li id="pageTree_131892626" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/simulation-tools-handbook-home/roman-i-sim-the-roman-image-simulator">Roman I-Sim - The Roman Image Simulator</a> <ul id="pagetreelvl3"> <li id="pageTree_131892630" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/roman-i-sim-the-roman-image-simulator/overview-of-roman-i-sim">Overview of Roman I-Sim</a> </li> <li id="pageTree_131892631" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/roman-i-sim-the-roman-image-simulator/roman-i-sim-tutorials">Roman I-Sim Tutorials</a> </li> <li id="pageTree_131892635" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/roman-i-sim-the-roman-image-simulator/caveats-of-using-roman-i-sim">Caveats of using Roman I-Sim</a> </li> </ul> </li> <li id="pageTree_78840534" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/simulation-tools-handbook-home/simulation-development-utilities">Simulation Development Utilities</a> <ul id="pagetreelvl3"> <li id="pageTree_78840535" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/simulation-development-utilities/pysiaf-for-roman">PySIAF for Roman</a> </li> <li id="pageTree_78840538" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/simulation-development-utilities/synphot-for-roman">Synphot for Roman</a> </li> <li id="pageTree_131892641" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/simulation-development-utilities/jupyter-footprint-viewer-for-roman">Jupyter Footprint Viewer for Roman</a> </li> </ul> </li> <li id="pageTree_78840508" class=""> <span class="no-children">•</span> <a href="/simulation-tools-handbook-home/future-development-of-simulation-tools">Future Development of Simulation Tools</a> </li> </ul> </li> </ul> </div><p></p> </div> </div> </div> <div class="nav-section-header"> APT User Guide </div> <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_29065930" class="pageTreeRoot"> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/raug"> Roman APT User Guide </a> <ul class="open" id="pagetreelvl2"> <li id="pageTree_76055219" class=""> <span class="no-children">•</span> <a href="/raug/quick-start-guide">Quick Start Guide</a> </li> <li id="pageTree_29065933" class=""> <span class="no-children">•</span> <a href="/raug/how-is-apt-different-for-roman">How is APT different for Roman?</a> </li> <li id="pageTree_29065931" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/raug/astronomers-proposal-tool-apt">Astronomers Proposal Tool (APT)</a> <ul id="pagetreelvl3"> <li id="pageTree_29065935" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/apt-program-elements">APT Program Elements</a> </li> <li id="pageTree_29065939" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/program-information">Program Information</a> </li> <li id="pageTree_29065940" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/raug/astronomers-proposal-tool-apt/targets">Targets</a> <ul id="pagetreelvl4"> <li id="pageTree_29065941" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/raug/astronomers-proposal-tool-apt/targets/fixed-targets">Fixed Targets</a> <ul id="pagetreelvl5"> <li id="pageTree_53116972" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/targets/fixed-targets/target-importer">Target Importer</a> </li> <li id="pageTree_29065942" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/targets/fixed-targets/fixed-target-resolver">Fixed Target Resolver</a> </li> </ul> </li> <li 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href="/raug/astronomers-proposal-tool-apt/aladin-visualization">Aladin Visualization</a> </li> <li id="pageTree_29065957" class=""> <a class="toggleChildren aui-icon aui-icon-small aui-iconfont-chevron-right" href=""></a> <a href="/raug/astronomers-proposal-tool-apt/requirements">Requirements</a> <ul id="pagetreelvl4"> <li id="pageTree_121340144" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/requirements/special-requirements">Special Requirements</a> </li> <li id="pageTree_121340147" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/requirements/linking-requirements">Linking Requirements</a> </li> <li id="pageTree_29065958" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/requirements/calibration-requirements">Calibration Requirements</a> </li> <li id="pageTree_121340151" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/requirements/engineering-requirements">Engineering Requirements</a> </li> </ul> </li> <li id="pageTree_43155933" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/execution-plans">Execution Plans</a> </li> <li id="pageTree_29065961" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/visit-planner">Visit Planner</a> </li> <li id="pageTree_29065966" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/submission">Submission</a> </li> <li id="pageTree_104563002" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/parallel-coronagraph-wfi-programs">Parallel Coronagraph-WFI Programs</a> </li> <li id="pageTree_76055172" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/future-developments-for-roman-apt">Future Developments for Roman APT</a> </li> <li id="pageTree_29065969" class=""> <span class="no-children">•</span> <a href="/raug/astronomers-proposal-tool-apt/appendix">Appendix</a> </li> </ul> </li> </ul> </li> </ul> </div><p></p> </div> </div> </div> </nav> <div> </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 class="flex-column col-12 col-dt-9 col-msdt-9 col-lg-9"> <div class="main-content "> <main> <article> <section id="page-title-section"> <ul class="breadcrumbs row"> <li><a href="/">Home</a></li> <li><span>Glossary and Acronyms</<span></li> </ul> <div id="title-heading" class="page-title row"> <div class="col-12 col-fl-lg-12 col-fl-dt-12 col-fl-msdt-12 col-fl-tb-12"> <h1 class="pageTitle title-text">Glossary and Acronyms</h1> </div> </div> </section> <section id="main-content" class='wiki-content'><div class="conf-macro output-block" data-hasbody="true" data-macro-name="sp-pagelayout"><div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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> </div> </div> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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>This table contains useful definitions of any Roman specific terms and acronyms.</p><p><br></p><div class="table-wrap"><table class="relative-table wrapped confluenceTable" style="width: 91.0776%;"><colgroup><col style="width: 16.3819%;"><col style="width: 83.6171%;"></colgroup><tbody><tr><th scope="col" class="confluenceTh">Term</th><th scope="col" class="confluenceTh">Definition</th></tr><tr><td class="confluenceTd"><p><strong>ASDF<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><a rel="nofollow" class="external-link" href="https://asdf.readthedocs.io/en/latest/">Advanced Scientific Data Format</a> or ASDF is a file format designed as a successor to the existing FITS format for astronomical data archiving. ASDF files are composed of human-readable, text-based metadata alongside binary data. ASDF was introduced by <a rel="nofollow" class="external-link" href="https://www.sciencedirect.com/science/article/pii/S2213133715000645">Greenfield, Droettboom, & Bray (2015)</a>. The format and its implications for Roman are discussed in the <span class="inline-comment-marker" data-ref="9feabd4a-834e-4094-aaf1-5c8f2fd5fdeb"><a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/data-handbook-home/wfi-data-format/introduction-to-asdf">Introduction to ASDF</a></span> article. </span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>CGI</strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><a rel="nofollow" class="external-link" href="https://roman.gsfc.nasa.gov/coronagraph.html">Roman Coronagraph Instrument</a> is a system of masks, prisms, detectors, and self-flexing mirrors built to block out the glare from distant stars and reveal the planets in orbit around them. The Coronograph will be used to demonstrate direct imaging technologies in space. <img alt="(warning)" data-emoticon-name="warning" class="emoticon emoticon-warning" src="/s/hk6mn1/9104/2xf956/_/images/icons/emoticons/warning.svg" data-emoji-short-name=":warning:"> This instrument is officially referred to as "the Coronagraph", but the older acronym, CGI, persists in some contexts. </span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>CRDS<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Calibration Reference Data System (CRDS) is a metadata-based system that maps datasets to data using mapping rules that is used by HST and JWST. The calibration pipelines for Roman observations use CRDS to identify the best reference files for the data being processed. How CRDS is used for Roman is given in the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/data-handbook-home/accessing-wfi-data/crds-for-reference-files">CRDS for Reference Files</a> article.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>ETC<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Exposure Time Calculator (ETC) is a tool that helps users make estimates about their observations to achieve their science goals. The ETC uses telescope and instrument characterizations with input source characteristics to perform simulations to explore the signal to noise in a given exposure time or vice versa. The ETC interfaces for Roman are described in the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/simulation-tools-handbook-home/roman-wfi-exposure-time-calculator"><span class="inline-comment-marker" data-ref="e81ea598-2377-406a-be2b-bfcec8854d4a">Roman WFI Exposure Time Calculator</span></a> article. </span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>EWA<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Element Wheel Assembly (EWA) is an opto-mechnical structure that holds <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design/wfi-optical-elements">the optical elements</a> in the Wide Field Instrument (WFI). It was constructed by Ball Aerospace (now BAE Systems). The <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design">WFI Design</a> section of the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide">WFI Imaging Mode User Guide</a> explains how the EWA works with other components of the WFI.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>Exposure<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"></span></p><p>The record of the data from a detector over a period of time.</p><p>See the article on the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/raug/astronomers-proposal-tool-apt/appendix/appendix-wfi-multiaccum-tables">WFI MultiAccum Tables</a> for more context.</p><p></p></div></td></tr><tr><td class="confluenceTd"><p><strong>FPA</strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Focal Plane Array (FPA) is the term for the collection of eighteen sensor chip assemblies (SCAs) in a three by six configuration mounted into the Mosaic Plate Assembly (MPA), the Sensor Control Electronics Assembly (SCEA), and the Analog Flex Harnesses that ties the SCAs to their corresponding Sensor Control Electronics (SCEs). The MPA and SCEA are operated at different temperatures, with the MPA being the coldest system in the WFI. The <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design/description-of-wfi">Description of WFI</a> article provides more information.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>FPS<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Focal Plane System (FPS) is the term for the Focal Plane Array (FPA) connected its associated Focal Plane Electronics (FPE) through a digital flex harness and a cable pass through assembly. The FPE operates at a higher temperature than either of the temperature zones in the FPA. The <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design/description-of-wfi">Description of WFI</a> article provides more information.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>IPAC</strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><a rel="nofollow" class="external-link" href="https://www.ipac.caltech.edu/">Infrared Processing and Analysis Center</a> (IPAC) is home to the Science Support Center (SSC) for Roman. </span></p></div></td></tr><tr><td class="confluenceTd"><div class="content-wrapper"><p><strong>JDox<br></strong></p></div></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">JDox refers to the <a rel="nofollow" class="external-link" href="https://jwst-docs.stsci.edu/">JWST Documentation</a>.</span></p></div></td></tr><tr><td class="confluenceTd"><div class="content-wrapper"><p><strong>Level 1 (L1) data products<span class="conf-macro output-inline" data-hasbody="false" data-macro-name="sp-anchor"><span class="confluence-anchor-link" id="GlossaryandAcronyms-Level1"></span><span id="Level1"></span></span></strong></p></div></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Level 1 refers to the uncalibrated "raw" individual exposures for each detector, which consist of raw pixel information formatted into the shape of the detector. These data contain all instrumental effects. For more context, see the <a data-macro-name="sp-nobody-link" href="https://stsci-docs.stsci.edu/draftsoc/latest/data-handbook-home/wfi-data-format/data-levels-and-products" class="conf-macro output-inline" data-hasbody="false">Data Levels and Products</a> article.</span></p></div></td></tr><tr><td class="confluenceTd"><div class="content-wrapper"><p><strong>Level 2 (L2) data products<br></strong></p><p><strong><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="sp-anchor"><span class="confluence-anchor-link" id="GlossaryandAcronyms-Level2"></span><span id="Level2"></span></span></strong></p></div></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Level 2 refers to the "calibrated" individual exposures for each detector that are corrected for instrument artifacts. Level 2 (L2) data have appropriate astrometric and geometric distortion information attached and, with the exception of Grism and Prism data, are transformed into units that have a known scaling with flux. Data arrays with both uncertainties and the data quality are provided. For more context, see the <a data-macro-name="sp-nobody-link" href="https://stsci-docs.stsci.edu/draftsoc/latest/data-handbook-home/wfi-data-format/data-levels-and-products" class="conf-macro output-inline" data-hasbody="false">Data Levels and Products</a> article.<span><br></span></span></p></div></td></tr><tr><td class="confluenceTd"><div class="content-wrapper"><p><strong>MA Table<br></strong></p></div></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">A multi-accum table, or MATable, is an incremental list of reads, grouped into resultant frames, which is used to define how an exposure is constructed. Only the resultant frames of an exposure are downlinked to ground and constitutes a Level-1 data product. <br>For more on MATables, please see the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/raug/astronomers-proposal-tool-apt/appendix/appendix-wfi-multiaccum-tables">Multi-Accum Table</a> article.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>MAST</strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><a rel="nofollow" class="external-link" href="https://mast.stsci.edu">Mikulski Archive for Space Telescopes</a> (MAST) is a NASA funded project to support and provide to the astronomical community a variety of astronomical data archives, with the primary focus on scientifically related data sets in the optical, ultraviolet, and near-infrared parts of the spectrum. MAST is located at the Space Telescope Science Institute (STScI) and will host Roman data. The <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/data-handbook-home/accessing-wfi-data">Accessing WFI Data</a> article provides more information.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>Observation<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">An observer-defined unit consisting of a series of one or more visits in the same general area of sky, which are contiguously schedulable within a single target visibility interval (though other science or engineering visits may be interleaved into the sequence). Observations are independent of one another except for observer-specified relationships.<span><br></span></span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>Observation Plan<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">The high-level, event-driven timeline that controls the execution of preplanned activities onboard the Observatory. An Observation Plan (OP) consists of an ordered sequence of visits with defined activities for each visit.<span><br></span></span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>Observation Sequence<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">A time-ordered set of observations planned for execution.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>Ramp<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Ramp refers to a three-dimensional data array containing the signal as a function of time that was measured using non-destructive reads of a detector.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>RAUG</strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><a data-macro-name="sp-plaintextbody-link" href="https://stsci-docs.stsci.edu/draftraug/latest/astronomers-proposal-tool-apt" class="conf-macro output-inline" data-hasbody="true">Roman APT User's Guide</a> (RAUG) is one of the components of the User Documentation for Roman hosted in RDox. The RAUG documents functions in the <a rel="nofollow" class="external-link" href="https://www.stsci.edu/scientific-community/software/astronomers-proposal-tool-apt">Astronomer's Proposal Tool (APT)</a> that are used to design observations for Roman.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>RCS<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Relative Calibration System (RCS) is a subcomponent of the Wide Field Instrument (WFI) that is the light source for internal instrument calibrations and, due to innovate design of the optical elements, can also be used with external light as well. RCS refers the original design of the hardware (<a rel="nofollow" class="external-link" href="https://digitalcommons.usu.edu/calcon/CALCON2020/all2020content/28/">Wright et al. 2020</a>), whereas a simplified design was ultimately adopted and called the simplified Roman Calibration System (sRCS). The <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design/description-of-wfi#DescriptionofWFI-RelativeCalibrationSystem(RCS)sRCS">sRCS is described</a> in a subsection of the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design/description-of-wfi">WFI Description</a> article.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>Readout<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">This is not a standard term for Roman, and this entry is provided for clarification only. Please see the entry for "resultant" to learn more. </span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>Resultant<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">A science image output generated from one or more detector reads. Roman resultants are the final result of up-the-ramp sampling for a single or multiple reads. Resultants are analogous to groups for JWST and samples for the HST WFC3/IR instrument.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>romancal<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><span class="aui-lozenge keyword-label grey custom-lozenge-default lowercase aui-custom-lozenge-block borders conf-macro output-inline" data-hasbody="false" data-macro-name="keyword-label"> romancal </span>is a python package that contains the calibration software for the WFI instrument. For more, see the <a data-macro-name="sp-nobody-link" href="https://stsci-docs.stsci.edu/draftsoc/latest/data-handbook-home/roman-stsci-data-pipelines" class="conf-macro output-inline" data-hasbody="false">Roman STScI Data Pipelines</a> article.<span><br></span></span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>S3 bucket<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">S3 is Amazon Simple Storage Service. It is a scalable and cost-effective object storage service on the AWS cloud platform. Storage containers within S3 are known as "S3 buckets".</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>S3 object<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">An S3 object is a file and any metadata that describes the file and an S3 bucket is a container for such objects.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>SCA</strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Sensor Chip Assembly (SCA) refers to the combination of a photon-sensitive mercury cadmium telluride (HgCdTe) layer that is bonded to a silicon Read-out Integrated Circuit (ROIC) and then connected to a mechanical mount with electrical connections. More information is provided in the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-detectors">WFI Detectors</a> section of the Instrument Handbook. For simplicity, the term "detectors" is often used in place of SCA. In other cases, the SCA at location in the Wide Field Instrument (WFI) focal plane is called WFI## where ## is the position <span>from 01 to 18</span> (see the<a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design/description-of-wfi#DescriptionofWFI-Fig-DetectorsFPAFigureofDetectors&theFocalPlaneArray"> Figure of the Detectors and Focal Plane Array</a>). In other cases, the SCA##### will refer to the specific identifier for a specific SCA; this was most common for detector characterization work performed before the final flight complement was selected. </span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>Science Platform<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><span style="text-decoration: none;">A computing environment hosted by the Science Operations Center (SOC) at STScI that allows users to customize science data analysis </span>with Roman software, user custom software, user custom data, and local access to the data archived in the cloud.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>sRCS<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">The simplified Relative Calibration System (sRCS) is a subcomponent of the Wide Field Instrument (WFI) that is the light source for internal instrument calibrations and, due to innovate design of the optical elements, can also be used with external light as well. RCS refers the original design of the hardware (<a rel="nofollow" class="external-link" href="https://digitalcommons.usu.edu/calcon/CALCON2020/all2020content/28/">Wright et al. 2020</a>), whereas a simplified design was ultimately adopted and called the simplified Roman Calibration System (sRCS). The <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design/description-of-wfi#DescriptionofWFI-RelativeCalibrationSystem(RCS)sRCS">sRCS is described</a> in a subsection of the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design/description-of-wfi">WFI Description</a> article.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>STIPS</strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><a data-macro-name="sp-plaintextbody-link" href="https://stsci-docs.stsci.edu/draftsoc/latest/simulation-tools-handbook-home/stips-space-telescope-imaging-product-simulator" class="conf-macro output-inline" data-hasbody="true">Space Telescope Imaging Product Simulator</a> (STIPS) is the is used to simulate realistic astronomical scenes for WFI similar to <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/glossary-and-acronyms#GlossaryandAcronyms-Level2">Level 2 (L2) data products</a> from the exposure level pipeline. STIPS is documented in the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/simulation-tools-handbook-home">Simulation Tools Handbook</a>. <a rel="nofollow" class="external-link" href="https://ui.adsabs.harvard.edu/abs/2024PASP..136l4502S/abstract">STIPS Development Team et al. (2024)</a> also provides detailed information on the tool.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>STScI</strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><a rel="nofollow" class="external-link" href="https://www.stsci.edu/home">Space Telescope Science Institute</a> (STScI) is home to the Science Operations Center (SOC) for Roman.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>WFI</strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Wide Field Instrument (WFI) is the 300 megapixel camera for Roman and the workhorse instrument for its the large-area data collection. A quick, but comprehensive, over view of the WFI is provided in the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/introduction-to-wfi/wfi-quick-reference">WFI Quick Reference</a> article. A more detailed description is given in the the <a rel="nofollow" class="external-link" href="https://roman-docs.stsci.edu/roman-instruments-home/wfi-imaging-mode-user-guide/wfi-design">WFI Design</a> article.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>Unevenly spaced resultants<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"></span></p><p><span style="text-decoration: none;">An exposure with unevenly spaced resultants is one in which: </span></p><ol><li><span style="text-decoration: none;">the number of reads included within a resultant is not constant over the exposure and / or</span></li><li>the sequence of reads included within a resultant is not constant over the exposure and / or</li><li>the number of reads skipped between resultants is not constant over the exposure. (Note: Reads are taken at a fixed time interval and non-destructively sampled.)</li></ol><p></p></div></td></tr><tr><td class="confluenceTd"><p><strong>URI<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">Uniform <span>Resource</span> Identifier (URI) is a unique sequence of characters that identifies an abstract or physical resource, usually, but not always, connected to the internet. URL is a specific type of URIs which is used to locate resources on a network, for example the internet.</span></p></div></td></tr><tr><td class="confluenceTd"><p><strong>YAML<br></strong></p></td><td class="confluenceTd"><div class="content-wrapper"><p><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include"><a rel="nofollow" class="external-link" href="https://yaml.org/">YAML Ain't Markup Language</a> (YAML) is a data-serialization language that is used to store meta data in ASDF files and to input configurations for some software. For more context, refer to the <a data-macro-name="sp-plaintextbody-link" href="https://stsci-docs.stsci.edu/draftsoc/latest/data-handbook-home/wfi-data-format" class="conf-macro output-inline" data-hasbody="true">WFI Data Format</a> section of the <a data-macro-name="sp-plaintextbody-link" href="https://stsci-docs.stsci.edu/draftsoc/latest/data-handbook-home" class="conf-macro output-inline" data-hasbody="true">Data Handbook</a>.</span></p></div></td></tr></tbody></table></div> </div> </div> </div> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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><br></p> </div> </div> </div> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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;"> <hr> </div> </div> </div> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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><br></p> </div> </div> </div> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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><span class="conf-macro output-inline" data-hasbody="false" data-macro-name="multiexcerpt-include">For additional questions not answered in this article, please contact the <a rel="nofollow" class="external-link" href="https://stsci.service-now.com/roman">Roman Help Desk</a>.</span></p> </div> </div> </div> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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;"> <br> </div> </div> </div> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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;"> <hr> </div> </div> </div> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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><br></p> </div> </div> </div> <div style="display: table; margin-bottom: 8px; table-layout: fixed; width: 100%;"> <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;"> <div class="plugin-tabmeta-details conf-macro output-block" data-hasbody="true" data-macro-name="details"><div class="table-wrap"><table class="relative-table wrapped confluenceTable" style="width: 62.2101%;"><colgroup><col style="width: 30.2113%;"><col style="width: 22.8507%;"><col style="width: 46.938%;"></colgroup><tbody><tr><th class="confluenceTh">Latest Update</th><td class="confluenceTd"><div class="content-wrapper"><p><time datetime="2024-06-07" class="date-past">07 Jun 2024</time> </p></div></td><td class="confluenceTd">Updated for the most recent publication.</td></tr><tr><th class="confluenceTh">Publication</th><td class="confluenceTd"><div class="content-wrapper"><p><time datetime="2023-06-02" class="date-past">02 Jun 2023</time> </p></div></td><td class="confluenceTd"><div class="content-wrapper"><p>Initial publication of the article.</p></div></td></tr></tbody></table></div></div> </div> </div> </div> <div style="display: table; 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