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Design and analysis of a beryllium three-mirror anastigmat telescope for the Japanese Advanced Meteorological Imager (JAMI)

Raytheon's Santa Barbara Remote Sensing facility in Goleta, California designed and built an advanced meteorological imager for the Japanese Ministry of Transport between March, 2000 and July, 2002 for MTSAT-1R. One of the most stressing requirements is visible band image quality near local midnight. The 30 month program schedule forced the design team to make key decisions about the telescope design based on very preliminary analyses. Subsequent detailed analyses revealed that thermal distortions in the beryllium three-mirror anastigmat telescope would cause unacceptable performance degradation during much of the orbit. Through careful thermal, structural, and optical (STOP) analysis, the design team was able to optimize the designs of the telescope and thermal control system while meeting the challenging procurement schedule for the telescope.