Algorithm Theoretical Basis Document https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236 2026-05-01T12:08:49Z 2026-05-01T12:08:49Z Emma Woolliams https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Algorithm Theoretical Basis Document?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.0 2021-10-04T11:32:07Z 2021-10-04T11:32:08Z

<p><strong><span class="diff-html-removed" id="removed-diff-0" previous="first-diff" changeId="removed-diff-0" next="removed-diff-1">Definition</span></strong><span class="diff-html-removed" previous="first-diff" changeId="removed-diff-0" next="removed-diff-1"> </span></p><p>A document that provides in detail, <span class="diff-html-removed" id="removed-diff-1" previous="removed-diff-0" changeId="removed-diff-1" next="added-diff-0">the theoretical </span><span class="diff-html-added" id="added-diff-0" previous="removed-diff-1" changeId="added-diff-0" next="removed-diff-2">thetheoretical </span>basis of an algorithm. Such <span class="diff-html-removed" id="removed-diff-2" previous="added-diff-0" changeId="removed-diff-2" next="added-diff-1">documents should </span><span class="diff-html-added" id="added-diff-1" previous="removed-diff-2" changeId="added-diff-1" next="removed-diff-3">documentsshould </span>accompany the products and be <span class="diff-html-removed" id="removed-diff-3" previous="added-diff-1" changeId="removed-diff-3" next="added-diff-2">updated when </span><span class="diff-html-added" id="added-diff-2" previous="removed-diff-3" changeId="added-diff-2" next="removed-diff-4">updatedwhen </span>changes occur in the algorithm resulting <span class="diff-html-removed" id="removed-diff-4" previous="added-diff-2" changeId="removed-diff-4" next="added-diff-3">in new </span><span class="diff-html-added" id="added-diff-3" previous="removed-diff-4" changeId="added-diff-3" next="removed-diff-5">innew </span>versions of products. </p><p><strong>Source</strong> </p><p><a href="https://ceos.org/document_management/Working_Groups/WGISS/Interest_Groups/Data_Stewardship/White_Papers/EO-DataStewardshipGlossary.pdf"> CEOS/WGISS/DSIG/GLOS</a> </p><p><strong><span class="diff-html-removed" id="removed-diff-5" previous="added-diff-3" changeId="removed-diff-5" next="last-diff">Category</span></strong><span class="diff-html-removed" previous="added-diff-3" changeId="removed-diff-5" next="last-diff"> </span></p><p><a href="https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fcalvalportal.ceos.org%2Ft-d_wiki%3Fp_p_id%3D54_INSTANCE_Wg3ti1194i20%26p_p_lifecycle%3D0%26p_p_state%3Dnormal%26p_p_mode%3Dview%26p_p_col_id%3Dcolumn-2%26p_p_col_count%3D1%26_54_INSTANCE_Wg3ti1194i20_struts_action%3D%252Fwiki_display%252Fview%26_54_INSTANCE_Wg3ti1194i20_nodeName%3DCEOS_Terms_and_Definitions%26_54_INSTANCE_Wg3ti1194i20_title%3D4.%2BData%2BStewardship%2Bwords&amp;data=04%7C01%7Cfaye.lai%40npl.co.uk%7C71d207afa14d469389d808d988e92c16%7C601e5460b1bf49c0bd2de76ffc186a8d%7C1%7C0%7C637691357310862875%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Ortjy2bF482FB%2Fu8940Qmf4JHeBYPdFdaqG9Av4rin8%3D&amp;reserved=0"><span class="diff-html-removed" previous="added-diff-3" changeId="removed-diff-5" next="last-diff">4. Data Stewardship words</span></a><span class="diff-html-removed" previous="added-diff-3" changeId="removed-diff-5" next="last-diff"> </span></p>

Emma Woolliams 2021-10-04T11:32:08Z Emma Woolliams https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Algorithm Theoretical Basis Document?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.1 2021-10-04T11:47:14Z 2021-10-04T11:32:08Z

<p><strong><span class="diff-html-added" id="added-diff-0" previous="first-diff" changeId="added-diff-0" next="last-diff">Definition</span></strong><span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"> </span></p><p>A document that provides in detail, thetheoretical basis of an algorithm. Such documentsshould accompany the products and be updatedwhen changes occur in the algorithm resulting innew versions of products. </p><p><strong>Source</strong> </p><p><a href="https://ceos.org/document_management/Working_Groups/WGISS/Interest_Groups/Data_Stewardship/White_Papers/EO-DataStewardshipGlossary.pdf"> CEOS/WGISS/DSIG/GLOS</a> </p>

Emma Woolliams 2021-10-04T11:32:08Z Emma Woolliams https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Algorithm Theoretical Basis Document?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.3 2021-11-22T11:53:41Z 2021-10-04T11:32:08Z

<p><strong>Definition</strong> </p><p>A document that provides in detail, <span class="diff-html-removed" id="removed-diff-0" previous="first-diff" changeId="removed-diff-0" next="added-diff-0">thetheoretical </span><span class="diff-html-added" id="added-diff-0" previous="removed-diff-0" changeId="added-diff-0" next="removed-diff-1">the theoretical </span>basis of an algorithm. Such <span class="diff-html-removed" id="removed-diff-1" previous="added-diff-0" changeId="removed-diff-1" next="added-diff-1">documentsshould </span><span class="diff-html-added" id="added-diff-1" previous="removed-diff-1" changeId="added-diff-1" next="removed-diff-2">documents should </span>accompany the products and be <span class="diff-html-removed" id="removed-diff-2" previous="added-diff-1" changeId="removed-diff-2" next="added-diff-2">updatedwhen </span><span class="diff-html-added" id="added-diff-2" previous="removed-diff-2" changeId="added-diff-2" next="removed-diff-3">updated when </span>changes occur in the algorithm resulting <span class="diff-html-removed" id="removed-diff-3" previous="added-diff-2" changeId="removed-diff-3" next="added-diff-3">innew </span><span class="diff-html-added" id="added-diff-3" previous="removed-diff-3" changeId="added-diff-3" next="added-diff-4">in new </span>versions of products. </p><table><tbody><tr><td><!----></td></tr></tbody></table><p><span class="diff-html-added" id="added-diff-4" previous="added-diff-3" changeId="added-diff-4" next="added-diff-5">ATBDs are developed for EOS instrument products, although some ATBDs address more than one product, and some products are addressed by more than one ATBD. ATBDs typically provide the theoretical basis, both the physical theory and the mathematical procedures and possible assumptions being applied, for the calculations that have to be made to convert the radiances received by the instruments to geophysical quantities. The geophysical quantities are then available to the scientific community for studies of the various characteristics of the Earth system. </span></p><table><tbody><tr><td><!----></td></tr></tbody></table><p><strong>Source</strong> </p><p><a href="https://ceos.org/document_management/Working_Groups/WGISS/Interest_Groups/Data_Stewardship/White_Papers/EO-DataStewardshipGlossary.pdf"> CEOS/WGISS/DSIG/GLOS</a> </p><p><a href="http://eospso.nasa.gov/content/algorithm-theoretical-basis-documents"><span class="diff-html-added" id="added-diff-5" previous="added-diff-4" changeId="added-diff-5" next="last-diff">NASA Earth Observing System Project Science Office</span></a><span class="diff-html-added" previous="added-diff-4" changeId="added-diff-5" next="last-diff"> </span></p><p><span class="diff-html-added" previous="added-diff-4" changeId="added-diff-5" next="last-diff">NESDIS Data Management Lexicon and Related Terms  </span></p><p><strong><span class="diff-html-added" previous="added-diff-4" changeId="added-diff-5" next="last-diff">Category</span></strong><span class="diff-html-added" previous="added-diff-4" changeId="added-diff-5" next="last-diff"> </span></p><p><a href="https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fcalvalportal.ceos.org%2Ft-d_wiki%3Fp_p_id%3D54_INSTANCE_Wg3ti1194i20%26p_p_lifecycle%3D0%26p_p_state%3Dnormal%26p_p_mode%3Dview%26p_p_col_id%3Dcolumn-2%26p_p_col_count%3D1%26_54_INSTANCE_Wg3ti1194i20_struts_action%3D%252Fwiki_display%252Fview%26_54_INSTANCE_Wg3ti1194i20_nodeName%3DCEOS_Terms_and_Definitions%26_54_INSTANCE_Wg3ti1194i20_title%3D4.%2BData%2BStewardship%2Bwords&amp;data=04%7C01%7Cfaye.lai%40npl.co.uk%7C71d207afa14d469389d808d988e92c16%7C601e5460b1bf49c0bd2de76ffc186a8d%7C1%7C0%7C637691357310862875%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Ortjy2bF482FB%2Fu8940Qmf4JHeBYPdFdaqG9Av4rin8%3D&amp;reserved=0"><span class="diff-html-added" previous="added-diff-4" changeId="added-diff-5" next="last-diff">4. Data Stewardship words</span></a><span class="diff-html-added" previous="added-diff-4" changeId="added-diff-5" next="last-diff"> </span></p>

Emma Woolliams 2021-10-04T11:32:08Z