Method for measuring relationship between surveying coordinate system and prism coordinate system of star sensor

Abstract

The invention relates to a method for measuring a relationship between a surveying coordinate system and a prism coordinate system of a star sensor. According to the method, the star sensor is mounted on a high-precision three-axle turntable and is subjected to irradiating by using a photostar simulator, a deviation of a Z axis of the prism coordinate system of the star sensor relative to a Z axis of the surveying coordinate system is measured by using a theodolite, and meanwhile, a deviation of an X axis of the prism coordinate system of the star sensor relative to an X axis of the surveying coordinate system and a deviation of a Y axis of the prism coordinate system of the star sensor relative to a Y axis of the surveying coordinate system are measured by using two theodolites. According to the method, a surveying coordinate system and a prism coordinate system of a detector cover glass are correlated by means of light measurement, coordinate system relationship measurement is completed on the ground, and the measured deviations between the coordinate systems can be directly applied to entire star loading and the direct correction of in-orbit surveying coordinate systems of an attitude and orbit control system; the method is high in reliability, high in dependability and high in implementation performance, and the problems that in-orbit data deviation is large, in-orbit correction is complicated, and the like can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of optical-mechanical-electrical integration, and in particular relates to a method for measuring the relationship between a star sensor measurement coordinate system and a prism coordinate system. Background technique [0002] During the use of the star sensor, due to the unclear relationship between its prism coordinate system and the deviation relationship between the prism coordinate system, the measurement accuracy deviation relative to the three-axis attitude of the spacecraft needs to be corrected by on-orbit recalibration to eliminate the deviation. There are a series of problems such as large deviation of on-orbit data and complex on-orbit correction. It makes it difficult for users to confirm whether the error source comes from the error of the star sensor itself or the error caused by installing the star when using the product. Contents of the invention [0003] The technical problem solved by ...

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Problems solved by technology

[0002] During the use of the star sensor, due to the unclear relationship between its prism coordinate system and the deviation relationship between the prism coordinate system, the measurement accuracy deviation relative to the three-axis attitude of the spacecraft needs to be corrected by on-orbit recalibration to eliminate the deviation. A series of problems such as large deviation of on-orbit data and complex on-orbit correction

It makes it difficult for users to confirm whether the error source comes from the error of the star sensor itself or the error caused by installing the star when using the product.

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