A real-time search method for stars near the pointing position of photoelectric tracking and measuring equipment

Abstract

The invention provides a real-time searching method for a fixed star around the directional position of a photoelectric tracking measurement device and mainly relates to the field of photoelectric tracking measurement and high-precision equipment guiding control. For the object tracking process, observation of fixed stars around the track is required. The invention designs a method to achieve the target tracking and to timely search fixed stars in a certain field angle range away from a target. The method uses the feature that the star position is basically constant in the second equatorial coordinate system, and avoids the problems that as the star and the target are moving in the level coordinate system, the calculation amount is large and the search complexity is big and so on. Through the virtual star, the relevant error is calculated to achieve the direct search in the star table, thereby reducing the search volume and improving the search efficiency and the hit rate of searching.

Description

technical field [0001] The invention belongs to the field of photoelectric tracking measurement, in particular to a method for real-time searching of stars near the pointing position of a photoelectric tracking measurement device. Background technique [0002] In the field of photoelectric tracking measurement, in order to accurately obtain the position data of the target, it is necessary to correct the systematic error and pointing deviation of the photoelectric tracking measurement equipment. However, the error of photoelectric tracking measurement equipment will change with time, so it needs to be corrected regularly. Since the position of stars is considered to have high precision, it can generally be used to calibrate the error of photoelectric tracking and measuring equipment. Therefore, if the position of stars within a certain field of view around the target can be observed when tracking the target, it can be real-time or quasi-real-time. Correct system errors and p...

AI Technical Summary

Problems solved by technology

[0004] (1) Due to the relationship between the target movement and the star movement, star search needs to judge the mutual movement direction, speed and other factors, especially when it is necessary to predict that the star will enter the field of view after a certain time, which greatly increases the complexity of star search;

[0005] (2) The positions of the stars in the star catalog remain unchanged, but they cannot be directly compared with the target position. When the flat position of the stars in the star catalog is to be converted to the position of the target horizon system, it is necessary to correct precession, nutation, annual parallax, Annual aberration, annual proper motion, and observation location time processing, etc., but when there are many stars, it will take a long time to convert them all;

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