Comet optical surface signal simulation method for deep space exploration

Abstract

The invention provides a comet optical surface 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 surface 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 aerospace navigation, and in particular relates to a comet optical surface signal simulation method for deep space exploration. Background technique [0002] In 2005, the "Impactor" launched by the "Deep Impact" spacecraft of the United States successfully hit the comet "Tempel 1", which opened the prelude to the exploration of human impact on comets. In this impact detection, optical navigation 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 optical navigation, it is inseparable from the starry sky and the target comet. For optical signals, before the probe actually takes images of the real starry sky and the target comet, the only way to obtain optical signals is the simulation in the ground laboratory environment. [0003] At present, many units at home a...

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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 relatively close to the detector, the comet nucleus in the comet will be completely exposed. At this time, what the detector observes is the surface signal. At present, there is no effective method to simulate the surface signal of the comet to obtain the target comet’s surface signal. Accurate Optical Information

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