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21 December 1994 AMSU-B: a new tool for atmospheric research
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Abstract
The U.K. Meteorological Office (UKMO) is providing to NOAA three flight models of the high frequency part of the Advanced Microwave Sounding Unit known as AMSU-B. The AMSU-B is a five channel microwave radiometer with channels centered at 89, 150, 183+/- 1, 183+/- 3 and 183+/- 7 GHz with a field of view of nominally 1.1 degree(s) (i.e. 15 km footprint at nadir). AMSU-B will fly on the NOAA KLM polar orbiters due to be launched in the next few years. All three AMSU-B flight models have undergone a comprehensive test and characterization program to measure the antenna pattern and spectral, radiometric and thermal properties of each instrument. The results from this test program have allowed a procedure for the in-orbit calibration of AMSU-B to be defined. In parallel with the development of the AMSU-B radiometer a program of aircraft radiometer measurements and model development has been carried out with the aim of improving our capability of predicting the radiative transfer through the atmosphere at AMSU-B frequencies. The aircraft radiometer has channels at 89 GHz and 157 GHz which are close to the corresponding window channels of AMSU-B and it can view both upwards and downwards. Measurements of clear transmission, sea surface emissivity and transmission through cloud liquid water have all been analyzed. Based on these measurements a forward radiative transfer model is being developed which will be used in the retrieval of temperature, humidity and cloud liquid water from AMSU.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Roger W. Saunders, Stephen J. English, and David C. Jones "AMSU-B: a new tool for atmospheric research", Proc. SPIE 2313, Microwave Instrumentation and Satellite Photogrammetry for Remote Sensing of the Earth, (21 December 1994); https://doi.org/10.1117/12.197338
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