Mr. Jun Wu Profile

Jun Wu

at Tsinghua Univ

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Proceedings Article | 16 June 2003 Paper

Temperature environment of cameras on Hangtian-Tsinghua-1 microsatellite

Luming Li, Jun Wu, Long Hu

Proceedings Volume 4897, (2003) https://doi.org/10.1117/12.467423

KEYWORDS: Satellites, Cameras, Imaging systems, Solar cells, Control systems, Satellite imaging, Temperature metrology, Space operations, Structural design, Sun

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Satellite temperature will fluctuate during the circle from the Sun light to the Earth shadow, which may disturb the focusing job of the camera. That's the reason for positive thermal control been chosen for some satellites, particularly for the camera system. While for a micro satellite, considering the constraints of it, passive thermal control was preferred. The temperature range of camera will be a main consideration during micro satellite design. Hangtian-Tsinghua-1 (HT-TH-1) micro satellite, launched at Jun 28, 2000, is a joined mission of Tsinghua University and Surrey Space center. The imaging system on board, which has three cameras with 40-meter resolution, has been working perfectly after launch and a lot of pictures have been acquired. In view of the thermal design, HT-TH-1 has provided a comfortable environment for the satellite: the average temperature was about 25ºC in the past two years. It will be very constructive to study the temperature environment and the thermal design if a high-resolution imaging system is built on micro satellite platform. The telemetry data of temperature of solar panels and subsystem modules since lunched was analyzed in order to understand the main factors for the fluctuation. Finally, a conclusion of passive thermal design for camera is given.

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