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Direct Comparison of Infrared Channel Measurements by Two ABIs to Monitor Their Calibration Stability.

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Title: Direct Comparison of Infrared Channel Measurements by Two ABIs to Monitor Their Calibration Stability.
Authors: Yu, Fangfang1 (AUTHOR), Wu, Xiangqian2 (AUTHOR) xiangqian.wu@noaa.gov, Yoo, Hyelim3 (AUTHOR), Xu, Hui1 (AUTHOR), Qian, Haifeng1,2 (AUTHOR)
Source: Remote Sensing. May2025, Vol. 17 Issue 10, p1656. 18p.
Subjects: Geostationary satellites, Brightness temperature, Zenith distance, Radiance, Calibration
Abstract: This paper introduces a method of monitoring infrared channel calibration stability through direct comparison of calibrated radiances by two Advanced Baseline Imager (ABI) on two geostationary (GEO) platforms. This GEO-GEO comparison is based on radiances in the overlapping area observed by the two ABIs, pixel by pixel, at approximately the same time, location, spectrum, and viewing zenith angle. It was initially developed for GOES-17 and subsequent GOES missions to validate the ABI's calibration around its local midnight—a subject of particular interest for instruments on three-axis stabilized geostationary satellites. With the cryocooler anomaly of the GOES-17 ABI, however, the GEO-GEO comparison became an indispensable tool to characterize GOES-17 ABI infrared (IR) channel calibration with high frequency, low uncertainty, and in near real time, providing critical feedback to root cause investigation and mitigation options. Later, the GEO-GEO comparison was applied to the GOES-18 ABI as originally intended and was proved successful. It confirms that, with few exceptions, radiometric calibration for all ABIs is stable to within 0.1 K when the radiance fluctuation is converted to the brightness temperature at 300 K. [ABSTRACT FROM AUTHOR]
Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Direct Comparison of Infrared Channel Measurements by Two ABIs to Monitor Their Calibration Stability.
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  Data: <searchLink fieldCode="AR" term="%22Yu%2C+Fangfang%22">Yu, Fangfang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Xiangqian%22">Wu, Xiangqian</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> xiangqian.wu@noaa.gov</i><br /><searchLink fieldCode="AR" term="%22Yoo%2C+Hyelim%22">Yoo, Hyelim</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Hui%22">Xu, Hui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qian%2C+Haifeng%22">Qian, Haifeng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Remote+Sensing%22">Remote Sensing</searchLink>. May2025, Vol. 17 Issue 10, p1656. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Geostationary+satellites%22">Geostationary satellites</searchLink><br /><searchLink fieldCode="DE" term="%22Brightness+temperature%22">Brightness temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Zenith+distance%22">Zenith distance</searchLink><br /><searchLink fieldCode="DE" term="%22Radiance%22">Radiance</searchLink><br /><searchLink fieldCode="DE" term="%22Calibration%22">Calibration</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper introduces a method of monitoring infrared channel calibration stability through direct comparison of calibrated radiances by two Advanced Baseline Imager (ABI) on two geostationary (GEO) platforms. This GEO-GEO comparison is based on radiances in the overlapping area observed by the two ABIs, pixel by pixel, at approximately the same time, location, spectrum, and viewing zenith angle. It was initially developed for GOES-17 and subsequent GOES missions to validate the ABI's calibration around its local midnight—a subject of particular interest for instruments on three-axis stabilized geostationary satellites. With the cryocooler anomaly of the GOES-17 ABI, however, the GEO-GEO comparison became an indispensable tool to characterize GOES-17 ABI infrared (IR) channel calibration with high frequency, low uncertainty, and in near real time, providing critical feedback to root cause investigation and mitigation options. Later, the GEO-GEO comparison was applied to the GOES-18 ABI as originally intended and was proved successful. It confirms that, with few exceptions, radiometric calibration for all ABIs is stable to within 0.1 K when the radiance fluctuation is converted to the brightness temperature at 300 K. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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    Identifiers:
      – Type: doi
        Value: 10.3390/rs17101656
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      – Code: eng
        Text: English
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        PageCount: 18
        StartPage: 1656
    Subjects:
      – SubjectFull: Geostationary satellites
        Type: general
      – SubjectFull: Brightness temperature
        Type: general
      – SubjectFull: Zenith distance
        Type: general
      – SubjectFull: Radiance
        Type: general
      – SubjectFull: Calibration
        Type: general
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      – TitleFull: Direct Comparison of Infrared Channel Measurements by Two ABIs to Monitor Their Calibration Stability.
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            NameFull: Yu, Fangfang
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            NameFull: Wu, Xiangqian
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            NameFull: Yoo, Hyelim
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            NameFull: Xu, Hui
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            NameFull: Qian, Haifeng
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              M: 05
              Text: May2025
              Type: published
              Y: 2025
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