Post-launch evaluation of the Advanced Microwave Sounding Unit-A on the NOAA-15 satellite

Tsan Mo

doi:10.1117/12.363514

24 September 1999 Post-launch evaluation of the Advanced Microwave Sounding Unit-A on the NOAA-15 satellite

Tsan Mo

Proceedings Volume 3750, Earth Observing Systems IV; (1999) https://doi.org/10.1117/12.363514
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The post-launch performance of the NOAA-15 Advanced Microwave Sounding Units-A was evaluated by analysis of the AMSU-A Level 1B data. We examined the main instrument characteristics, including the noise-equivalent uncertainty of temperature (NE(Delta) T), channel gains, instrument temperatures, and the cold space and blackbody radiometric counts, which are fused for on-board calibration. Short- and long-term trends of these instrument characteristics are presented. Effect of the instrument temperature on the radiometric calibration counts and channel gains are also demonstrated. It shows that the radiometric counts and channel gains correlate linearly with the instrument temperature. The NE(Delta) T values calculated from the AMSU- A 1B data compare favorably to those obtained from the pre- launch test data. All channels on the NOAA-15 AMSU-A have functioned well since its powering up after launch, except Channel 14 which has shown an anomalous behavior since early January 1999. THis study summarizes our evaluation of the AMSU-A performance during a four-month period of the NOAA-15 post-launch operation, and introduces the new AMSU-A data to data users.

Citation Download Citation

Tsan Mo "Post-launch evaluation of the Advanced Microwave Sounding Unit-A on the NOAA-15 satellite", Proc. SPIE 3750, Earth Observing Systems IV, (24 September 1999); https://doi.org/10.1117/12.363514

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