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Developing Vicarious Calibration for Microwave Sounding Instruments Using Lunar Radiation
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2018
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Source: IEEE Transactions on Geoscience and Remote Sensing, 56(11), 6723-6733
[PDF-2.69 MB]
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Journal Title:IEEE Transactions on Geoscience and Remote Sensing
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Description:Accurate global observations from space are critical for global climate change study. However, atmospheric temperature trend derived from spaceborne microwave instruments remains a subject of debate, due mainly to the uncertainty in characterizing the long-term drift of instrument calibration. Thus, a highly stable target with a well-known microwave radiation is required to evaluate the long-term calibration stability. This paper develops a new model to simulate the lunar emission at microwave frequencies, and the model is then used for monitoring the stability of the Advanced Technology Microwave Sounder (ATMS) onboard Suomi NPP satellite. It is shown that the ATMS cold space view of lunar radiation agrees well with the model simulation during the past five years and this instrument is capable of serving the reference instrument for atmospheric temperature trending studies, and connecting the previous generation of microwave sounders from NOAA-15 to the future Joint Polar Satellite System Microwave Sounder onboard NOAA-20 satellite.
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Source:IEEE Transactions on Geoscience and Remote Sensing, 56(11), 6723-6733
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ISSN:0196-2892;1558-0644;
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