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    <identifier>10.57760/sciencedb.04371</identifier>
    <datestamp>2022-10-28T11:26:15Z</datestamp>
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<oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:date>2022-10-28</dc:date>
  <dc:title>Design and performance test of self-calibration multi-channel infrared radiometer</dc:title>
  <dc:identifier>doi:10.57760/sciencedb.04371</dc:identifier>
  <dc:language>en</dc:language>
  <dc:description>In&amp;nbsp;order&amp;nbsp;to&amp;nbsp;meet&amp;nbsp;the&amp;nbsp;needs&amp;nbsp;of&amp;nbsp;automated&amp;nbsp;observational&amp;nbsp;absolute&amp;nbsp;radiometric&amp;nbsp;calibration&amp;nbsp;of&amp;nbsp;satellite remote&amp;nbsp;sensing&amp;nbsp;thermal&amp;nbsp;infrared&amp;nbsp;band,&amp;nbsp;a&amp;nbsp;self-calibration&amp;nbsp;multi-channel&amp;nbsp;infrared&amp;nbsp;radiometer&amp;nbsp;with&amp;nbsp;automatic observation&amp;nbsp;capability&amp;nbsp;was&amp;nbsp;developed.&amp;nbsp;The&amp;nbsp;equipment&amp;nbsp;needs&amp;nbsp;to&amp;nbsp;have&amp;nbsp;the&amp;nbsp;following&amp;nbsp;features:&amp;nbsp;1)&amp;nbsp;The&amp;nbsp;design&amp;nbsp;of the&amp;nbsp;motor-driven&amp;nbsp;gold-plated&amp;nbsp;reflector&amp;nbsp;is&amp;nbsp;used&amp;nbsp;to&amp;nbsp;achieve&amp;nbsp;the&amp;nbsp;measurement&amp;nbsp;of&amp;nbsp;atmospheric&amp;nbsp;downward&amp;nbsp;radiation and&amp;nbsp;surface&amp;nbsp;radiance&amp;nbsp;at&amp;nbsp;an&amp;nbsp;elevation&amp;nbsp;angle&amp;nbsp;of&amp;nbsp;0&amp;deg;～ 90&amp;deg;,&amp;nbsp;which&amp;nbsp;is&amp;nbsp;provided&amp;nbsp;to&amp;nbsp;eliminate&amp;nbsp;the&amp;nbsp;influence&amp;nbsp;of atmospheric&amp;nbsp;downward&amp;nbsp;radiation&amp;nbsp;on&amp;nbsp;inversion&amp;nbsp;of&amp;nbsp;surface&amp;nbsp;temperature&amp;nbsp;Technological&amp;nbsp;means.&amp;nbsp;2)&amp;nbsp;The&amp;nbsp;method&amp;nbsp;of filter&amp;nbsp;wheel&amp;nbsp;spectrometry&amp;nbsp;is&amp;nbsp;used&amp;nbsp;to&amp;nbsp;realize&amp;nbsp;the&amp;nbsp;automatic&amp;nbsp;setting&amp;nbsp;of&amp;nbsp;6&amp;nbsp;spectral&amp;nbsp;channels.&amp;nbsp;Combined&amp;nbsp;with&amp;nbsp;the multi-channel&amp;nbsp;temperature&amp;nbsp;and&amp;nbsp;emissivity&amp;nbsp;separation&amp;nbsp;algorithm,&amp;nbsp;the&amp;nbsp;separation&amp;nbsp;of&amp;nbsp;site&amp;nbsp;temperature&amp;nbsp;and emissivity&amp;nbsp;can&amp;nbsp;be&amp;nbsp;achieved,&amp;nbsp;which&amp;nbsp;provides&amp;nbsp;absolute&amp;nbsp;radiation&amp;nbsp;calibration&amp;nbsp;for&amp;nbsp;the&amp;nbsp;thermal&amp;nbsp;infrared&amp;nbsp;band&amp;nbsp;of satellite&amp;nbsp;remote&amp;nbsp;sensors.&amp;nbsp;There&amp;nbsp;are&amp;nbsp;two&amp;nbsp;key&amp;nbsp;factors.&amp;nbsp;3)&amp;nbsp;A&amp;nbsp;black&amp;nbsp;body&amp;nbsp;with&amp;nbsp;two&amp;nbsp;built-in&amp;nbsp;temperature&amp;nbsp;control accuracy&amp;nbsp;better&amp;nbsp;than&amp;nbsp;0.04&amp;nbsp;K&amp;nbsp;and&amp;nbsp;0.05&amp;nbsp;K,&amp;nbsp;emissivity&amp;nbsp;higher&amp;nbsp;than&amp;nbsp;0.994,&amp;nbsp;stability&amp;nbsp;both&amp;nbsp;better&amp;nbsp;than&amp;nbsp;0.001&amp;nbsp;4&amp;nbsp;is&amp;nbsp;used to&amp;nbsp;achieve&amp;nbsp;real-time&amp;nbsp;radiation&amp;nbsp;calibration&amp;nbsp;of&amp;nbsp;the&amp;nbsp;internal&amp;nbsp;detector,&amp;nbsp;effectively&amp;nbsp;eliminating&amp;nbsp;internal&amp;nbsp;background radiation&amp;nbsp;For&amp;nbsp;the&amp;nbsp;effect&amp;nbsp;of&amp;nbsp;radiation&amp;nbsp;measurement,&amp;nbsp;the&amp;nbsp;calibration&amp;nbsp;uncertainty&amp;nbsp;is&amp;nbsp;less&amp;nbsp;than&amp;nbsp;0.167%.&amp;nbsp;The equivalent&amp;nbsp;temperature&amp;nbsp;measurement&amp;nbsp;uncertainty&amp;nbsp;is&amp;nbsp;0.2&amp;nbsp;K&amp;nbsp;(@303&amp;nbsp;K,&amp;nbsp;11&amp;nbsp;&amp;mu;m),&amp;nbsp;which&amp;nbsp;lays&amp;nbsp;the&amp;nbsp;foundation&amp;nbsp;for&amp;nbsp;the application&amp;nbsp;of&amp;nbsp;automatic&amp;nbsp;calibration&amp;nbsp;of&amp;nbsp;the&amp;nbsp;infrared&amp;nbsp;thermal&amp;nbsp;field&amp;nbsp;in&amp;nbsp;the&amp;nbsp;remote&amp;nbsp;sensor.</dc:description>
  <dc:subject>calibration; autonmous; radiometer; self-calibration; uncertainty analysis</dc:subject>
  <dc:creator>zhang yun xiang</dc:creator>
  <dc:creator>Li Xin</dc:creator>
  <dc:creator>LI Chen</dc:creator>
  <dc:creator>Zheng Xiaobing</dc:creator>
  <dc:rights>PUBLIC</dc:rights>
  <dc:rights>https://creativecommons.org/publicdomain/zero/1.0/</dc:rights>
  <dc:type>dataset</dc:type>
  <dc:relation>http://www.doi.org/10.5768/JAO202041.0406004</dc:relation>
  <dc:publisher>Science Data Bank</dc:publisher>
</oai_dc:dc>

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