Thermal Design and Verification of Two-dimensional Steering Remote Sensing System with Multi-optical Axis at GEO Orbit

Inhalt:
With the continuous development of high orbit remote sensing technique, the multi-optical axis space cameras, with large aperture, have been required for much higher performance indicators as well as more comprehensive tasks. Meanwhile, the demands for orbit adaptability and mobility of the core components, such as the opto-mechanical structure, have been gradually emerging. For the loads with multi-resolution camera integration and two-dimensional steering function, the harshness of high orbit extreme space environment is also greatly improved with its mobility. Due to the restriction of heat dissipation space caused by rotation, the heat dissipation direction changes at any time, and the coexistence or alternation of direct sunlight and shielding requires that the thermal control system must have automatic adaptability. According to the working and environmental characteristics of multi optical axis two-dimensional steering optical system, in order to solve the problems such as no fixed heat dissipation direction, no independent heat dissipation surface and no expected working time, based on the design concept of structural thermal control integration, multi-directional shielding and scattering integrated radiation shielding device, constant temperature large-span turntable and comprehensive thermal management are adopted, The temperature index of the main optical components of the system is successfully met, and the thermal control design of the camera is verified on orbit, which provides a good reference for the temperature control of the multi optical axis system of high-orbit two-dimensional steering, and provides support for reducing the thermal control resources.