A Test Method for Satellite Stray Light

Abstract

The invention discloses a method for testing stray light of a satellite. The method includes the steps that a sun illumination change range at a satellite observation point is obtained; an atmospheric radiation transmission model is selected; annual changes of the in-orbit radiance of the satellite in the observation directions are obtained; the satellite is irradiated through a simulative light source, and the annual changes of the in-orbit radiance of the satellite can be covered; stray radiation caused by a darkroom is obtained through a background imaging test of a load; the direct solar radiation inhibiting capacity is tested; the stray radiation on the surface of a satellite body is measured; the rejection ratio PST of each pixel is calculated, the in-orbit stray light inhibiting capacity of the load is verified, and the key surfaces of the satellite are identified. The method can be feasibly used for whole-satellite-level stray light testing for stray light inhibiting, analysis and verification of the satellite.

Description

technical field [0001] The invention relates to the technical field of stray light testing methods, in particular to a satellite stray light testing method, which has important guiding significance for satellite layout and optical load stray light suppression measures; it can analyze and verify stray light for models under research. Background technique [0002] The problem of stray light in optical payloads is closely related to the layout and orbit design of the whole star. For general optical satellites, the improvement of stray light suppression performance mainly depends on the design of the optical payload by the payload development unit, which generally includes the design of the payload hood and the design of the internal optical path. For satellites equipped with highly sensitive optical payloads, in addition to the necessary extinction design inside the payload, suppression and verification measures must be taken from the perspective of the entire star. [0003] A...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used methods for detecting stray light are the point source method and the surface source method, both of which are based on the stray light test method of the optical system, which cannot obtain the stray light caused by the stray radiation caused by the surface of the star under the satellite’s orbital lighting conditions.

Images