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  <title>Resolution</title>
  <link rel="self" href="https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236" />
  <subtitle>Resolution</subtitle>
  <id>https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236</id>
  <updated>2026-04-15T23:26:52Z</updated>
  <dc:date>2026-04-15T23:26:52Z</dc:date>
  <entry>
    <title>Resolution 1.1</title>
    <link rel="alternate" href="https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Resolution?_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/Resolution?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.1</id>
    <updated>2021-10-10T19:37:24Z</updated>
    <published>2020-01-23T11:07:59Z</published>
    <summary type="html">&lt;p&gt; &lt;strong&gt;Definition&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; &lt;span style="font-size: 8pt;"&gt;(1) smallest change in a quantity being measured that causes a perceptible change in the corresponding indication&lt;/span&gt;&lt;/p&gt;&lt;p&gt; &lt;span style="font-size: 8pt;"&gt;(2) the least angular/linear/temporal/spectral distance between two identical point sources of radiation that can be distinguished according to a given criterion,&lt;/span&gt;&lt;/p&gt;&lt;div&gt; (3) the least vertical/geographical/temporal distance between two identical atmospheric features that can be distinguished in a gridded numerical product or in time series of measurements; resolution is equal to or coarser than vertical/geographical/temporal sampling of the grid or the measurement time series&lt;/div&gt;&lt;div&gt;  &lt;/div&gt;&lt;p&gt; &lt;strong&gt;Source&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; &lt;span style="font-size: 8pt;"&gt;(1) VIM/ISO:99 [&lt;a href="https://www.bipm.org/en/publications/guides/vim.html"&gt;RD18&lt;/a&gt;];&lt;/span&gt; &lt;span style="font-size: 8pt;"&gt;(2) NIST [RD15];&lt;/span&gt; (3) MACC [RD13]&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; RD13: MACC II Service Validation Protocol, Deliverable D153.1, May 2013&lt;/p&gt;&lt;p&gt; &lt;strong&gt;Suggestions&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; &lt;span style="font-size: 8pt;"&gt;Need something about resolution of an imaging instrument and to distinguish spectral, spatial and temporal resolutions.&lt;/span&gt;&lt;/p&gt;&lt;p&gt; Probably need multiple separate types of resolution&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" style="font-size: 8pt;"&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>2020-01-23T11:07:59Z</dc:date>
  </entry>
  <entry>
    <title>Resolution 1.2</title>
    <link rel="alternate" href="https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Resolution?_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/Resolution?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.2</id>
    <updated>2021-11-24T14:57:59Z</updated>
    <published>2020-01-23T11:07:59Z</published>
    <summary type="html">&lt;p&gt; &lt;strong&gt;Definition&lt;/strong&gt;&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="added-diff-1"&gt; &lt;/span&gt;&lt;span class="diff-html-added" id="added-diff-0" previous="first-diff" changeId="added-diff-0" next="added-diff-1"&gt; &lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="added-diff-1"&gt; &lt;/span&gt;&lt;em style="font-size: 8pt;"&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="added-diff-1"&gt;Radiometric resolution&lt;/span&gt;&lt;/em&gt;&lt;span style="font-size: 8pt;"&gt;&lt;span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="added-diff-1"&gt; is the amount of information in each pixel, i.e. the number of bits representing the energy recorded. Each bit records an exponent of power 2. For example, an 8 bit resolution is 28, which indicates that the sensor has 256 potential digital values &lt;/span&gt;(&lt;span class="diff-html-added" id="added-diff-1" previous="added-diff-0" changeId="added-diff-1" next="added-diff-2"&gt;0-255) to store information. Thus, the higher the radiometric resolution, the more values are available to store information, providing better discrimination between even the slightest differences in energy. &lt;/span&gt;&lt;/span&gt;&lt;span class="diff-html-added" previous="added-diff-0" changeId="added-diff-1" next="added-diff-2"&gt;&lt;!----&gt;&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="added-diff-0" changeId="added-diff-1" next="added-diff-2"&gt; &lt;/span&gt;&lt;span style="font-size: 8pt;"&gt;&lt;span class="diff-html-added" previous="added-diff-0" changeId="added-diff-1" next="added-diff-2"&gt;(&lt;/span&gt;1) smallest change in a quantity being measured that causes a perceptible change in the corresponding indication&lt;/span&gt;&lt;/p&gt;&lt;p&gt; &lt;span style="font-size: 8pt;"&gt;(2) the least angular/linear/temporal/spectral distance between two identical point sources of radiation that can be distinguished according to a given criterion,&lt;/span&gt;&lt;/p&gt;&lt;div&gt; (3) the least vertical/geographical/temporal distance between two identical atmospheric features that can be distinguished in a gridded numerical product or in time series of measurements; resolution is equal to or coarser than vertical/geographical/temporal sampling of the grid or the measurement time series&lt;/div&gt;&lt;div&gt;  &lt;/div&gt;&lt;p&gt; &lt;strong&gt;Source&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; &lt;span style="font-size: 8pt;"&gt;(1) VIM/ISO:99 [&lt;a href="https://www.bipm.org/en/publications/guides/vim.html"&gt;RD18&lt;/a&gt;];&lt;/span&gt; &lt;span style="font-size: 8pt;"&gt;(2) NIST [RD15];&lt;/span&gt; (3) MACC [RD13]&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; RD13: MACC II Service Validation Protocol, Deliverable D153.1, May 2013&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="added-diff-1" changeId="added-diff-2" next="last-diff"&gt; &lt;/span&gt;&lt;a href="https://earthdata.nasa.gov/learn/backgrounders/remote-sensing"&gt;&lt;span class="diff-html-added" id="added-diff-2" previous="added-diff-1" changeId="added-diff-2" next="last-diff"&gt;NASA Earthdata&lt;/span&gt;&lt;/a&gt;&lt;span class="diff-html-added" previous="added-diff-1" changeId="added-diff-2" next="last-diff"&gt;&lt;!----&gt;&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span class="diff-html-added" previous="added-diff-1" changeId="added-diff-2" next="last-diff"&gt; NESDIS Data Management Lexicon and Related Terms &lt;/span&gt;&lt;/p&gt;&lt;p&gt; &lt;strong&gt;Suggestions&lt;/strong&gt;&lt;/p&gt;&lt;p&gt; &lt;span style="font-size: 8pt;"&gt;Need something about resolution of an imaging instrument and to distinguish spectral, spatial and temporal resolutions.&lt;/span&gt;&lt;/p&gt;&lt;p&gt; Probably need multiple separate types of resolution&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" style="font-size: 8pt;"&gt;3. Observation properties words&lt;/a&gt;&lt;/p&gt;</summary>
    <dc:creator>Emma Woolliams</dc:creator>
    <dc:date>2020-01-23T11:07:59Z</dc:date>
  </entry>
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