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Method for using the moon's thermal output to track calibration drifts in instruments on board satellites observing the earth
Method for using the moon's thermal output to track calibration drifts in instruments on board satellites observing the earth
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机译：利用月球的热输出跟踪观测地球的卫星上仪器中校准漂移的方法
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摘要
A method of calibrating a spectrometer, while orbiting the Earth, includes the steps of (a) determining a period of time in which the Moon is within a field of view (FOV) of the spectrometer and (b) stopping the FOV of the spectrometer during this period of time. During this period of time, multiple “free views” of the Moon are available, in which lunar IR intensities may be received by the spectrometer that are comparable to intensity levels obtained from an internal calibration test (ICT) on a satellite. The method measures the IR radiance from the Moon during this period of time. After filtering the lunar IR radiances by an integral function, the spectrometer is calibrated using the “free views” as a benchmark.
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