Ground Truth
Ground Truth
https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236
2026-04-15T12:19:27Z
2026-04-15T12:19:27Z
Ground Truth 1.0
Emma Woolliams
https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Ground Truth?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.0
2021-10-04T18:02:38Z
2021-10-04T18:02:38Z
<p><strong>Definition</strong> </p><p><strong><!----></strong> </p><p><strong><!----></strong>Geophysical parameter data, measured <span class="diff-html-removed" id="removed-diff-0" previous="first-diff" changeId="removed-diff-0" next="added-diff-0">or collected </span><span class="diff-html-added" id="added-diff-0" previous="removed-diff-0" changeId="added-diff-0" next="removed-diff-1">orcollected </span>by other means than by the <span class="diff-html-removed" id="removed-diff-1" previous="added-diff-0" changeId="removed-diff-1" next="added-diff-1">instrument itself</span><span class="diff-html-added" id="added-diff-1" previous="removed-diff-1" changeId="added-diff-1" next="removed-diff-2">instrumentitself</span>, used as correlative or calibration/<span class="diff-html-removed" id="removed-diff-2" previous="added-diff-1" changeId="removed-diff-2" next="added-diff-2">validation data </span><span class="diff-html-added" id="added-diff-2" previous="removed-diff-2" changeId="added-diff-2" next="removed-diff-3">validationdata </span>for that instrument data. It includes <span class="diff-html-removed" id="removed-diff-3" previous="added-diff-2" changeId="removed-diff-3" next="added-diff-3">data taken </span><span class="diff-html-added" id="added-diff-3" previous="removed-diff-3" changeId="added-diff-3" next="removed-diff-4">datataken </span>on the ground, on the ocean or in <span class="diff-html-removed" id="removed-diff-4" previous="added-diff-3" changeId="removed-diff-4" next="added-diff-4">the atmosphere</span><span class="diff-html-added" id="added-diff-4" previous="removed-diff-4" changeId="added-diff-4" next="removed-diff-5">theatmosphere</span>. Ground truth data is <span class="diff-html-removed" id="removed-diff-5" previous="added-diff-4" changeId="removed-diff-5" next="added-diff-5">another measurement </span><span class="diff-html-added" id="added-diff-5" previous="removed-diff-5" changeId="added-diff-5" next="removed-diff-6">anothermeasurement </span>of the phenomenon of interest; it <span class="diff-html-removed" id="removed-diff-6" previous="added-diff-5" changeId="removed-diff-6" next="added-diff-6">is not </span><span class="diff-html-added" id="added-diff-6" previous="removed-diff-6" changeId="added-diff-6" next="removed-diff-7">isnot </span>necessarily more "true" or more accurate <span class="diff-html-removed" id="removed-diff-7" previous="added-diff-6" changeId="removed-diff-7" next="added-diff-7">than the </span><span class="diff-html-added" id="added-diff-7" previous="removed-diff-7" changeId="added-diff-7" next="removed-diff-8">thanthe </span>instrument data. </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><a href=""><span class="diff-html-removed" id="removed-diff-8" previous="added-diff-7" changeId="removed-diff-8" next="last-diff">CEOS-WGISS Document: Auxiliary Data in the CEOS Community: Reference Guidelines Document Part 1: Current Usage (1996) accessible at wgiss.ceos.org/archive/archive.doc/ads200part1.doc</span></a><span class="diff-html-removed" previous="added-diff-7" changeId="removed-diff-8" next="last-diff"> </span></p><p><strong><span class="diff-html-removed" previous="added-diff-7" changeId="removed-diff-8" next="last-diff">Category</span></strong><span class="diff-html-removed" previous="added-diff-7" changeId="removed-diff-8" 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%3D3.%2BObservation%2Bproperties%2Bwords&data=04%7C01%7Cfaye.lai%40npl.co.uk%7C71d207afa14d469389d808d988e92c16%7C601e5460b1bf49c0bd2de76ffc186a8d%7C1%7C0%7C637691357310857886%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=sNQT%2Fm1r%2FyMk1JZE5BN%2Bo2OKtOj%2FjhyIFrfqx0A%2B4zg%3D&reserved=0"><span class="diff-html-removed" previous="added-diff-7" changeId="removed-diff-8" next="last-diff">3. Observation properties words</span></a><span class="diff-html-removed" previous="added-diff-7" changeId="removed-diff-8" next="last-diff"> </span></p>
Emma Woolliams
2021-10-04T18:02:38Z