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  <title>Footprint</title>
  <link rel="self" href="https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236" />
  <subtitle>Footprint</subtitle>
  <id>https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236</id>
  <updated>2026-09-05T10:39:00Z</updated>
  <dc:date>2026-09-05T10:39:00Z</dc:date>
  <entry>
    <title>Footprint 1.1</title>
    <link rel="alternate" href="https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Footprint?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.1" />
    <author>
      <name>Emma Woolliams</name>
    </author>
    <id>https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Footprint?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.1</id>
    <updated>2021-10-08T18:43:47Z</updated>
    <published>2020-01-16T14:12:44Z</published>
    <summary type="html">&lt;p&gt; &lt;strong&gt;Definition&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; the area of a target encircled by the field-of-view of a detector of radiation, or irradiated by an active system&lt;/p&gt;&lt;p&gt; &lt;strong&gt;Source&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; &lt;span style="font-size: 8pt;"&gt;NIST [RD15]&lt;/span&gt;&lt;/p&gt;&lt;p&gt; RD15: Prokhorov, A. V., R. U. Datla, V. P. Zakharenkov, V. Privalsky, T. W. Humpherys, and V. I. Sapritsky, Spaceborne Optoelectronic Sensors and their Radiometric Calibration. Terms and Definitions. Part 1. Calibration Techniques, Ed. by A. C. Parr and L. K. Issaev, NIST Technical Note NISTIR 7203, March 2005&lt;/p&gt;&lt;p&gt; &lt;strong&gt;Suggestions&lt;/strong&gt;&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt; &lt;/span&gt;&lt;span class="diff-html-added" id="added-diff-0" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt; &lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt; &lt;/span&gt;&lt;strong style="font-size: 8pt;"&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt;Category&lt;/span&gt;&lt;/strong&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt;&lt;!----&gt;&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt; &lt;/span&gt;&lt;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%3D3.%2BObservation%2Bproperties%2Bwords&amp;amp;data=04%7C01%7Cfaye.lai%40npl.co.uk%7C71d207afa14d469389d808d988e92c16%7C601e5460b1bf49c0bd2de76ffc186a8d%7C1%7C0%7C637691357310857886%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;amp;sdata=sNQT%2Fm1r%2FyMk1JZE5BN%2Bo2OKtOj%2FjhyIFrfqx0A%2B4zg%3D&amp;amp;reserved=0"&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt;3. Observation properties words&lt;/span&gt;&lt;/a&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt;&lt;!----&gt;&lt;/span&gt;&lt;/p&gt;</summary>
    <dc:creator>Emma Woolliams</dc:creator>
    <dc:date>2020-01-16T14:12:44Z</dc:date>
  </entry>
  <entry>
    <title>Footprint 1.2</title>
    <link rel="alternate" href="https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Footprint?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.2" />
    <author>
      <name>Emma Woolliams</name>
    </author>
    <id>https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Footprint?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.2</id>
    <updated>2021-10-08T18:55:57Z</updated>
    <published>2020-01-16T14:12:44Z</published>
    <summary type="html">&lt;p&gt; &lt;strong&gt;Definition&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; the area of a target encircled by the field-of-view of a detector of radiation, or irradiated by an active system&lt;/p&gt;&lt;p&gt; &lt;strong&gt;Source&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; &lt;span style="font-size: 8pt;"&gt;NIST [RD15]&lt;/span&gt;&lt;/p&gt;&lt;p&gt; RD15: Prokhorov, A. V., R. U. Datla, V. P. Zakharenkov, V. Privalsky, T. W. Humpherys, and V. I. Sapritsky, Spaceborne Optoelectronic Sensors and their Radiometric Calibration. Terms and Definitions. Part 1. Calibration Techniques, Ed. by A. C. Parr and L. K. Issaev, NIST Technical Note NISTIR 7203, March 2005&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt; &lt;/span&gt;&lt;span class="diff-html-added" id="added-diff-0" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt; &lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt; &lt;/span&gt;&lt;a href="http://ESA PDGS Glossary, PGSI-GSEG-EOPG-LI-13-0033 (MM-PDGS Glossary Issue 2.0_forReview.docx)"&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt;http://ESA PDGS Glossary, PGSI-GSEG-EOPG-LI-13-0033 (MM-PDGS Glossary Issue 2.0_forReview.docx)&lt;/span&gt;&lt;/a&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"&gt;&lt;!----&gt;&lt;/span&gt;&lt;/p&gt;&lt;p&gt; &lt;strong&gt;Suggestions&lt;/strong&gt;&lt;/p&gt;&lt;p&gt;  &lt;/p&gt;&lt;p&gt; &lt;strong style="font-size: 8pt;"&gt;Category&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; &lt;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%3D3.%2BObservation%2Bproperties%2Bwords&amp;amp;data=04%7C01%7Cfaye.lai%40npl.co.uk%7C71d207afa14d469389d808d988e92c16%7C601e5460b1bf49c0bd2de76ffc186a8d%7C1%7C0%7C637691357310857886%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;amp;sdata=sNQT%2Fm1r%2FyMk1JZE5BN%2Bo2OKtOj%2FjhyIFrfqx0A%2B4zg%3D&amp;amp;reserved=0"&gt;3. Observation properties words&lt;/a&gt;&lt;/p&gt;</summary>
    <dc:creator>Emma Woolliams</dc:creator>
    <dc:date>2020-01-16T14:12:44Z</dc:date>
  </entry>
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