19 August 1993 Characterization of the channel passband response of AMSU-B
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Abstract
The Advanced Microwave Sounding Unit B (AMSU-B) is a five channel microwave radiometer. The instrument provides two 'window' channels, one at 89 GHz and one at 150 GHz. Three channels centered around 183.31 GHz are used to determine the atmosphere's humidity profile. Double sideband operation improves the instrument's temperature sensitivity by reducing its effective noise temperature. However, because this implies that the atmosphere is sounded over two separate frequency bands it is necessary to determine how the sensitivity of the instrument varies across each passband, and also the difference between the sensitivities of the lower and upper sidebands of each channel. This is especially important for the 183.31 GHz channels where the sounding frequency relates to altitude in the atmosphere. This paper describes a test technique which was developed to characterize the variation in sensitivity of each channel of AMSU-B.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mark L. Jarrett, Janet E. Charlton, "Characterization of the channel passband response of AMSU-B", Proc. SPIE 1935, Microwave Instrumentation for Remote Sensing of the Earth, (19 August 1993); doi: 10.1117/12.152588; https://doi.org/10.1117/12.152588
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