Thermal control method of high temperature stability for high resolution space camera

High temperature stability is an important parameter in thermal design of space cameras, because high resolution space cameras need highly stable thermal system. However, severe orbital thermal environment and complex satellite attitudes bring big challenges for thermal control of space camera. Traditional thermal control method can not meet high stability. Therefore, a novel thermal control method of high temperature stability is proposed to deal with the problem. Indirect radiation thermal control and differential temperature control method is applied for the structure of the camera, which significantly decreases temperature fluctuation and disturbance of external thermal environment. The in-orbit temperature data indicate that the temperature fluctuation of structures of the camera is better than ±0.2 °C and the mirrors are better than ±0.1 °C. The orbital temperature performance demonstrates that the thermal control method of high temperature stability for the high resolution space camera is reasonable and feasible and the thermal system satisfies the high stability demand. The novel method solves the demand of high thermal stability under harsh environment, and plays an important role in enhancing space camera resolution.