Characterization of the channel passband response of AMSU-B

Mark L. Jarrett; Janet E. Charlton

doi:10.1117/12.152588

19 August 1993 Characterization of the channel passband response of AMSU-B

Mark L. Jarrett, Janet E. Charlton

Proceedings Volume 1935, Microwave Instrumentation for Remote Sensing of the Earth; (1993) https://doi.org/10.1117/12.152588
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

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.

Citation Download Citation

Mark L. Jarrett and 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); https://doi.org/10.1117/12.152588

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