On-Orbit Vicarious Radiometric Calibration and Validation of ZY1-02E Thermal Infrared Sensor
The ZY1-02E satellite carrying a thermal infrared sensor was successfully launched from the Taiyuan Satellite Launch Center on 26 December 2021. The quantitative characteristics of this thermal infrared camera, for use in supporting applications, were acquired as part of an absolute radiometric cali...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/4/994 |
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| author | Hongzhao Tang Junfeng Xie Xianhui Dou Honggeng Zhang Wei Chen |
| author_facet | Hongzhao Tang Junfeng Xie Xianhui Dou Honggeng Zhang Wei Chen |
| author_sort | Hongzhao Tang |
| collection | DOAJ |
| description | The ZY1-02E satellite carrying a thermal infrared sensor was successfully launched from the Taiyuan Satellite Launch Center on 26 December 2021. The quantitative characteristics of this thermal infrared camera, for use in supporting applications, were acquired as part of an absolute radiometric calibration campaign performed at the Ulansuhai Nur and Baotou calibration site (Inner Mongolia, July 2022). In this paper, we propose a novel on-orbit absolute radiometric calibration technique, based on multiple ground observations, that considers the radiometric characteristics of the ZY1-02E thermal infrared sensor. A variety of natural surface objects were selected as references, including bodies of water, bare soil, a desert in Kubuqi, and sand and vegetation at the Baotou calibration site. During satellite overpass, the 102F Fourier transform thermal infrared spectrometer and the SI-111 infrared temperature sensor were used to measure temperature and ground-leaving radiance for these surface profiles. Atmospheric water vapor, aerosol optical depth, and ozone concentration were simultaneously obtained from the CIMEL CE318 Sun photometer and the MICROTOP II ozonometer. Atmospheric profile information was acquired from radiosonde instruments carried by sounding balloons. Synchronous measurements of atmospheric parameters and ECMWF ERA5 reanalysis data were then combined and input to an atmospheric radiative transfer model (MODTRAN6.0) used to calculate apparent radiance. Calibration coefficients were determined from the measured apparent radiance and satellite-observed digital number (DN), for use in calculating the on-orbit observed radiance of typical surface objects. These values were then compared with the apparent radiance of each object, using radiative transfer calculations to evaluate the accuracy of on-orbit absolute radiometric calibration. The results show that the accuracy of this absolute radiometric calibration is better than 0.6 K. This approach allows the thermal infrared channel to be unrestricted by the limitations of spectrum matching between a satellite and field measurements, with strong applicability to various types of calibration sites. |
| first_indexed | 2024-03-11T08:12:36Z |
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| id | doaj.art-2f8852ea78da4f16aed41a0494726262 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T08:12:36Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-2f8852ea78da4f16aed41a04947262622023-11-16T23:02:16ZengMDPI AGRemote Sensing2072-42922023-02-0115499410.3390/rs15040994On-Orbit Vicarious Radiometric Calibration and Validation of ZY1-02E Thermal Infrared SensorHongzhao Tang0Junfeng Xie1Xianhui Dou2Honggeng Zhang3Wei Chen4Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing 100094, ChinaLand Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing 100094, ChinaLand Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing 100094, ChinaLand Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing 100094, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaThe ZY1-02E satellite carrying a thermal infrared sensor was successfully launched from the Taiyuan Satellite Launch Center on 26 December 2021. The quantitative characteristics of this thermal infrared camera, for use in supporting applications, were acquired as part of an absolute radiometric calibration campaign performed at the Ulansuhai Nur and Baotou calibration site (Inner Mongolia, July 2022). In this paper, we propose a novel on-orbit absolute radiometric calibration technique, based on multiple ground observations, that considers the radiometric characteristics of the ZY1-02E thermal infrared sensor. A variety of natural surface objects were selected as references, including bodies of water, bare soil, a desert in Kubuqi, and sand and vegetation at the Baotou calibration site. During satellite overpass, the 102F Fourier transform thermal infrared spectrometer and the SI-111 infrared temperature sensor were used to measure temperature and ground-leaving radiance for these surface profiles. Atmospheric water vapor, aerosol optical depth, and ozone concentration were simultaneously obtained from the CIMEL CE318 Sun photometer and the MICROTOP II ozonometer. Atmospheric profile information was acquired from radiosonde instruments carried by sounding balloons. Synchronous measurements of atmospheric parameters and ECMWF ERA5 reanalysis data were then combined and input to an atmospheric radiative transfer model (MODTRAN6.0) used to calculate apparent radiance. Calibration coefficients were determined from the measured apparent radiance and satellite-observed digital number (DN), for use in calculating the on-orbit observed radiance of typical surface objects. These values were then compared with the apparent radiance of each object, using radiative transfer calculations to evaluate the accuracy of on-orbit absolute radiometric calibration. The results show that the accuracy of this absolute radiometric calibration is better than 0.6 K. This approach allows the thermal infrared channel to be unrestricted by the limitations of spectrum matching between a satellite and field measurements, with strong applicability to various types of calibration sites.https://www.mdpi.com/2072-4292/15/4/994ZY1-02Ethermal infrared sensorradiometric calibrationUlansuhai Nur |
| spellingShingle | Hongzhao Tang Junfeng Xie Xianhui Dou Honggeng Zhang Wei Chen On-Orbit Vicarious Radiometric Calibration and Validation of ZY1-02E Thermal Infrared Sensor Remote Sensing ZY1-02E thermal infrared sensor radiometric calibration Ulansuhai Nur |
| title | On-Orbit Vicarious Radiometric Calibration and Validation of ZY1-02E Thermal Infrared Sensor |
| title_full | On-Orbit Vicarious Radiometric Calibration and Validation of ZY1-02E Thermal Infrared Sensor |
| title_fullStr | On-Orbit Vicarious Radiometric Calibration and Validation of ZY1-02E Thermal Infrared Sensor |
| title_full_unstemmed | On-Orbit Vicarious Radiometric Calibration and Validation of ZY1-02E Thermal Infrared Sensor |
| title_short | On-Orbit Vicarious Radiometric Calibration and Validation of ZY1-02E Thermal Infrared Sensor |
| title_sort | on orbit vicarious radiometric calibration and validation of zy1 02e thermal infrared sensor |
| topic | ZY1-02E thermal infrared sensor radiometric calibration Ulansuhai Nur |
| url | https://www.mdpi.com/2072-4292/15/4/994 |
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