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Calibration of Multi-Channel Millimeter-Wave Radiometers of Geosynchronous FY-4M Using Brightness Temperature of the Lunar Surface at Millimeter Channels
- Source :
- IGARSS
- Publication Year :
- 2019
- Publisher :
- IEEE, 2019.
-
Abstract
- The Moon is a good calibration source for the millimeter-wave radiometer onboard the Feng Yun-4 Millimeter (FY-4M) satellite. The temperature profiles of the lunar surface can be obtained by solving the one-dimensional heat conduction equation with the thermo-physical properties of regolith. Then, the loss tangent is fitting using the Chinese Chang’e-2 (CE-2) 37GHz brightness temperatures (TB) data against TiO2 abundances, which is derived from Clementine five-bands multispectral data. The calculated surface temperatures and the TBs are validated by Diviner infrared data and CE-2 37GHz TB data. With the theoretical analysis of the radiative transfer, the TBs at FY-4M frequencies of lunar center area is obtained for calibration. In addition, the abnormal thermal emission at "cold spots" should be excluded for calibration.
- Subjects :
- Brightness
Radiometer
Materials science
010504 meteorology & atmospheric sciences
01 natural sciences
Regolith
Brightness temperature
0103 physical sciences
Radiative transfer
Calibration
Millimeter
010303 astronomy & astrophysics
0105 earth and related environmental sciences
Diviner
Remote sensing
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium
- Accession number :
- edsair.doi...........b7eb43f8b79da4f52b950806bc92d3d4