Comet optical point signal simulation method for deep space exploration

Abstract

The invention provides a comet optical point signal simulation method for deep space exploration. The method comprises the following steps of: programming by using an OpenGL three-dimensional graphics library to realize simulation of an optical signal; reconstructing a dot signal of the comet by using a particle system and generating a simulation signal of a corresponding direction according to the input time of a simulator, the position of an observation platform and the direction of a camera; projecting the simulation signal on a high-performance display; and completing digital-to-analog conversion of the optical signal on the space and radiance to finally form a simulation optical signal. The method has the advantages of simplicity, intuition, good effect and capability of providing a reliable dynamic optical signal for an optical navigation camera used in deep space exploration, particularly comet impact detection.

Description

Technical field [0001] The invention belongs to the technical field of space navigation, and in particular relates to a comet optical signal simulation method for deep space detection. Background technique [0002] In 2005, the "Impactor" launched by the US "DeepImpact" spacecraft successfully impacted the "Tempel1" comet, which opened the prelude to the exploration of human impacts on comets. The optical navigation in this collision detection is an important guarantee for the impactor to accurately hit the target. In optical navigation, whether it is the test of the navigation camera or the verification of the data processing scheme in the optical navigation, it is inseparable from the starry sky and the target comet. Optical signal. Before the detector actually takes real images of the starry sky and the target comet, the only way to obtain the optical signal is the simulation in the ground laboratory environment. [0003] At present, many units at home and abroad have successfu...

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Problems solved by technology

[0003] At present, many units at home and abroad have successfully developed a star simulator, which satisfies the test and experiment work of using the attitude of the star to measure, but the navigation camera can only obtain the star information for attitude determination. position relative to the target comet, accurate optical information must also be obtained for the target comet

[0004] When the comet is far away from the detector, what the detector observes is the point signal caused by the joint action of the comet nucleus, coma and background brightness. At present, there is no effective method to simulate the point signal of the comet to obtain the target comet’s point signal. Accurate Optical Information

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