Radiometric Calibration Evaluation for FY3D MERSI-II Thermal Infrared Channels at Lake Qinghai
The absolute radiometric accuracy of the Fengyun 3D advanced Medium Resolution Spectral Imager (FY3D MERSI-II) thermal infrared bands was evaluated using the collected field measurements and atmospheric transfer simulations during 16–22 August 2019 at Lake Qinghai. A thermal infrared radiometer equi...
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MDPI AG
2021-01-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/13/3/466 |
| _version_ | 1827597055904710656 |
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| author | Lin Yan Yonghong Hu Yong Zhang Xiao-Ming Li Changyong Dou Jun Li Yidan Si Lijun Zhang |
| author_facet | Lin Yan Yonghong Hu Yong Zhang Xiao-Ming Li Changyong Dou Jun Li Yidan Si Lijun Zhang |
| author_sort | Lin Yan |
| collection | DOAJ |
| description | The absolute radiometric accuracy of the Fengyun 3D advanced Medium Resolution Spectral Imager (FY3D MERSI-II) thermal infrared bands was evaluated using the collected field measurements and atmospheric transfer simulations during 16–22 August 2019 at Lake Qinghai. A thermal infrared radiometer equipped on an unmanned surface vehicle was used to continuously collect the water temperature. Atmospheric conditions, surface emissivity, and aerosol optical depth measured near the field experiment site were adopted by the atmospheric transfer code to calculate the parameters about the influence of atmosphere on long-wave radiation, including the path radiance and the transmittance propagated from land surface to the satellite. The radiometric calibration accuracy analysis suggests that the differences between the simulated brightness temperature and satellite-based brightness temperature are −0.346 K and −0.722 K for channel 24 on 18 and 20 August, respectively, while it reaches −0.460 K and −1.036 K for channel 25 on 18 and 20 August, respectively. The vicarious calibration coefficients were found to be in good agreement with the internal onboard calibration coefficient in channel 24 and 25 of the FY3D MERSI-II according to the validation analysis in selected regions. The thermal infrared bands of the FY3D have a good in-orbit operational status according to our vicarious calibration experiments. |
| first_indexed | 2024-03-09T03:22:52Z |
| format | Article |
| id | doaj.art-cc6edd110af04e96a2c76c09439f2e03 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T03:22:52Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-cc6edd110af04e96a2c76c09439f2e032023-12-03T15:07:29ZengMDPI AGRemote Sensing2072-42922021-01-0113346610.3390/rs13030466Radiometric Calibration Evaluation for FY3D MERSI-II Thermal Infrared Channels at Lake QinghaiLin Yan0Yonghong Hu1Yong Zhang2Xiao-Ming Li3Changyong Dou4Jun Li5Yidan Si6Lijun Zhang7Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaKey Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaNational Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, ChinaKey Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaKey Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaSchool of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, ChinaNational Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, ChinaNational Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, ChinaThe absolute radiometric accuracy of the Fengyun 3D advanced Medium Resolution Spectral Imager (FY3D MERSI-II) thermal infrared bands was evaluated using the collected field measurements and atmospheric transfer simulations during 16–22 August 2019 at Lake Qinghai. A thermal infrared radiometer equipped on an unmanned surface vehicle was used to continuously collect the water temperature. Atmospheric conditions, surface emissivity, and aerosol optical depth measured near the field experiment site were adopted by the atmospheric transfer code to calculate the parameters about the influence of atmosphere on long-wave radiation, including the path radiance and the transmittance propagated from land surface to the satellite. The radiometric calibration accuracy analysis suggests that the differences between the simulated brightness temperature and satellite-based brightness temperature are −0.346 K and −0.722 K for channel 24 on 18 and 20 August, respectively, while it reaches −0.460 K and −1.036 K for channel 25 on 18 and 20 August, respectively. The vicarious calibration coefficients were found to be in good agreement with the internal onboard calibration coefficient in channel 24 and 25 of the FY3D MERSI-II according to the validation analysis in selected regions. The thermal infrared bands of the FY3D have a good in-orbit operational status according to our vicarious calibration experiments.https://www.mdpi.com/2072-4292/13/3/466radiometric calibrationFY3Dthermal infrared bandslake qinghai |
| spellingShingle | Lin Yan Yonghong Hu Yong Zhang Xiao-Ming Li Changyong Dou Jun Li Yidan Si Lijun Zhang Radiometric Calibration Evaluation for FY3D MERSI-II Thermal Infrared Channels at Lake Qinghai Remote Sensing radiometric calibration FY3D thermal infrared bands lake qinghai |
| title | Radiometric Calibration Evaluation for FY3D MERSI-II Thermal Infrared Channels at Lake Qinghai |
| title_full | Radiometric Calibration Evaluation for FY3D MERSI-II Thermal Infrared Channels at Lake Qinghai |
| title_fullStr | Radiometric Calibration Evaluation for FY3D MERSI-II Thermal Infrared Channels at Lake Qinghai |
| title_full_unstemmed | Radiometric Calibration Evaluation for FY3D MERSI-II Thermal Infrared Channels at Lake Qinghai |
| title_short | Radiometric Calibration Evaluation for FY3D MERSI-II Thermal Infrared Channels at Lake Qinghai |
| title_sort | radiometric calibration evaluation for fy3d mersi ii thermal infrared channels at lake qinghai |
| topic | radiometric calibration FY3D thermal infrared bands lake qinghai |
| url | https://www.mdpi.com/2072-4292/13/3/466 |
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