In response to the heat dissipation requirements of space optical remote sensor electronics and other heat sources, the characteristics of the orbital heat flux of the high inclination orbit where the remote sensor is located are analyzed. Combined with the position characteristics of the remote sensor platform and the two-dimensional manoeuvring characteristics, the spatial layout position and required area of the heat dissipation radiator are determined. Utilizing heat pipe network to achieve the realization of the heat dissipation radiator groups, achieving effective heat dissipation of the heat source while the high orbital heat flux on the single position of the radiator. Adopting a non-metallic and graphite film composite heat dissipation radiator form, further improving the temperature uniformity of the heat dissipation radiator and effectively enhancing the heat dissipation of the remote sensor. Through this technology, the heat dissipation problem of complex orbit heat flux remote sensors can be solved.
The space star camera and altimeter set strict temperature rage and stability target, overmuch temperature fluctuate will make optical-mechanical deformation, decrease modulation transfer function (MTF), result in hot noise of Complementary Metal-Oxide-Semiconductors (CMOS) detector, decrease signal-to-noise ratio. The optical systems of the star camera and the laser altimeter are transmission lens and RC two-mirror lens respectively. The detectors of a star cameras are two CMOS; the laser altimeter includes six laser transmitters. To satisfy the requirements of thermal control index, thermal design multi-stage insulation technology for lens of star camera. Design thermal management for the laser altimeter’s heat sources. The thermal control system has been running for more than 2 years in space, under the extremely conditions in orbit, the temperature data show that the temperature fluctuation of lens is minimized to ±0.2℃, the temperature variation of CMOS and laser transmitters are less than ±0.1℃and ±0.2℃ respectively, which verify that the thermal control is appropriate.
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