A method for ground fast astronomical positioning of ccd zenith telescope

Abstract

The invention discloses a method for performing rapid celestial fix through a CCD (charge coupled device) zenith telescope on the ground. According to the method, the CCD zenith telescope is used for imaging a fixed star in a sky region near to the zenith of an observation point twice (the barrel of the telescope rotates by 180 degrees around a rotating shaft during the two times of imaging); precise astronomical longitudes and latitudes of the observation point can be rapidly obtained by processing the two shot fixed star images, the corresponding precise time and inclinometer data. Compared with the conventional generally used satellite positioning method, the method disclosed by the invention has the advantages of full autonomy, high reliability, high invisibility, working safety, no electromagnetic interference and the like. Compared with other celestial fix methods, the method disclosed by the invention has the advantage of high precision. Furthermore, star selection is not needed in the method, so that the observation process is simplified, and the observation efficiency is greatly improved; the shortcomings that the conventional astronomical telescope is complicated in observation and low in efficiency, needs an observation foundation pier and cannot perform mobile observation are overcome. The method has extremely good development and application prospects.

Description

technical field [0001] The invention relates to the field of astrometry, in particular to a ground fast astronomical positioning method. Background technique [0002] With the development of space technology, satellite positioning is widely used in various fields, even as the only means of positioning. However, the satellite positioning system is characterized by the broadcasting of navigation messages in a specific format by a specific signal at a specific frequency. The navigation signal is extremely weak and vulnerable to attack and interference. Therefore, there is a great danger in relying too much on satellite positioning. [0003] Compared with satellite positioning, astronomical positioning only passively accepts radiation from celestial bodies. It has the advantages of high reliability, good concealment, safe work, and no electromagnetic interference. It is a completely autonomous positioning method that does not rely on other means. The safety and important role ...

AI Technical Summary

Problems solved by technology

The accuracy of star trackers is still low and cannot meet the needs of high-precision positioning

Radio sextants require bulky and expensive radio antennas, and the number of available radio sources is small and the radio source signals are weak, making it difficult to achieve continuous positioning, low positioning accuracy, and discontinuous positioning guarantees, which directly affect the application and quality of radio astronomical positioning technology. develop

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