26 October 2004 Autonomous trending system for the AIRS/AMSU-A/HSB instruments on the Aqua spacecraft
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Abstract
The Atmospheric Infrared Sounder (AIRS), the Advanced Microwave Sounding Unit (AMSU-A), and the Humidity Sounder for Brazil (HSB) instruments were launched aboard NASA's Aqua spacecraft on May 4, 2002 into near-polar Earth orbit with a 1:30 PM ascending equator crossing. The AIRS instrument measures 2,378 infrared and four visible/near-infrared channels, while the 15-channel AMSU-A and four-channel HSB instrument provide simultaneous observations in the microwave region from 23.8-89 GHz and 150-189 GHz, respectively. Together these instruments produce thousands of measurements per second for a mission expected to last 7 years. This paper describes the challenges of identifying and monitoring, among the approximately 1,500 available engineering and quality assessment parameters, a representative subset for tracking each instrument's performance. A software system has been developed which autonomously extracts key items from the voluminous project database, performs data analysis and creates web-based daily summary reports with links to these archived results. Independently, a second process autonomously monitors these trending data products and notifies team members by e-mail if parameters exceed their trending-specific monitoring limits. Finally, this paper describes how this system has been used to predict long-term instrument performance trends, investigate previous flight anomalies and maintain the instrument within calibration specifications.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephen J. Licata, Steven E. Broberg, Denis Elliott, Steven L. Gaiser, "Autonomous trending system for the AIRS/AMSU-A/HSB instruments on the Aqua spacecraft", Proc. SPIE 5542, Earth Observing Systems IX, (26 October 2004); doi: 10.1117/12.557362; https://doi.org/10.1117/12.557362
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