Design and Analysis of JMAPS Instrument Thermal Control System

摘要

The Joint Milli-Arcsecond Pathfinder Survey (JMAPS) is a Department of the Navy space astronomy mission. The goal of the mission is to update the bright star catalogs for the purpose of attitude determination. The JMAPS instrument consists of a single-aperture optical telescope assembly (OTA), Focal Plane Assembly (FPA) and supporting electronics. The FPA needs to be maintained below 193K with a stability requirement of less than 10mK. Also, the stringent optical distortion budget levies an additional stability requirement of less than 0.15K on the OTA over a period of five days. Lastly, the JMAPS jitter specification compels the instrument thermal control system (TCS) to be passive (i.e. containing no mechanical moving parts). This paper presents the design, analytical simulations, and results of some component testing of the TCS to demonstrate how it meets the challenging JMAPS thermal requirements.