Remote Sensing Technology and Application, Volume. 40, Issue 3, 610(2025)
A Radiation Reference Transfer Method based on Hyperspectral Measurements on Geostationary Orbit
Figures & Tables(10)
Fig. 1. The flow of radiation reference transfer with GIIRS as reference remote sensor
Fig. 2. The BT distribution of AGRI and GIIRS on January 2， 2023 at UTC 0200 and UTC 0300
Fig. 3. Scatter diagram of odd-time hourly radiance distribution of GIIRS and AGRI after inter-calibration on January 2， 2023
Fig. 4. Scatter diagram of even-time hourly radiance distribution of GIIRS and AGRI after inter-calibration on January 2， 2023
Fig. 5. The time-series plot of BT deviation of AGRI relative to GIIRS on January 2， 2023
Fig. 7. Schematic diagram of the spatial collocation between the footprints of the target remote sensor （black） and the reference remote sensor （green）
Fig. 8. Sketch of the GEO （red） and LEO （blue） satellites collocated observations distribution
Table 1.
The instrument parameters of FY-4A/GIIRS and FY-4A/AGRI View tableView in ArticleTable 1.
The instrument parameters of FY-4A/GIIRS and FY-4A/AGRI 参数名称 FY-4A/GIIRS FY-4A/AGRI 通道数 LWIR: 689 MWIR: 961 14(通道1~6为可见光及近红外波段，通道7~14为红外波段) 光谱范围 LWIR: 700~1 130 cm-1 MWIR: 1 650~2 250 cm-1 通道中心波长最短在可见光波段(0.47 μm)；最长至LWIR波段(13.5 μm) 空间分辨率 16.0 km 可见光: 0.5~1.0 km 红外: 2.0~4.0 km 辐射定标精度 LWIR: 1.0 K MWIR: 1.5 K 1.0 K 时间分辨率 中国区域67 min 全圆盘15 min 中国区域5 min 灵敏度 LWIR: 0.5~1.1 mW/m2·sr·cm-1
MWIR: 0.1~0.14 mW/m2·sr·cm-1
0.2 K 光谱分辨率 0.625 cm-1 光谱定标精度 10 ppm
Table 2.
Pixels Number and BT deviation of AGRI and GIIRS inter-calibration at different times View tableView in ArticleTable 2.
Pixels Number and BT deviation of AGRI and GIIRS inter-calibration at different times UTC 0100 0300 0500 0700 0900 1100 1300 1500 1900 2100 2300 匹配数量 3 283 5 514 3 064 2 803 4 720 3 170 3 418 5 559 3 672 5 247 3 351 ΔBT(AGRI-GIIRS)/K -0.3 0.3 1.2 0.2 -0.3 0.6 -1.6 -1.6 -2.9 -2.7 -1.7 UTC 0000 0200 0400 0600 0800 1000 1200 1400 2000 2200 匹配数量 1 060 3 229 406 1 629 2 910 300 1 231 3 150 2 848 122 ΔBT(AGRI-GIIRS)/K 0.8 0.2 4.2 1.2 -0.5 6.2 2.4 -2.0 -2.3 6.1
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Qiang GUO, Yuning LIU, Xin WANG, Wen HUI. A Radiation Reference Transfer Method based on Hyperspectral Measurements on Geostationary Orbit[J]. Remote Sensing Technology and Application, 2025, 40(3): 610
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Received: Jan. 25, 2024
Accepted: --
Published Online: Sep. 28, 2025
The Author Email: Xin WANG (xinwang@cma.gov.cn)
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