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Method for performing rapid celestial fix through CCD (charge coupled device) zenith telescope on ground

A technology for astronomical positioning and telescopes, which is applied in astronomical navigation and other directions, can solve the problems that affect the application and development of radio astronomical positioning technology, cannot meet high-precision positioning, and is difficult to achieve continuous positioning, and achieve low observation efficiency, easy mobile observation, and low weight. light effect

Inactive Publication Date: 2014-06-04
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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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

Method used

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  • Method for performing rapid celestial fix through CCD (charge coupled device) zenith telescope on ground
  • Method for performing rapid celestial fix through CCD (charge coupled device) zenith telescope on ground
  • Method for performing rapid celestial fix through CCD (charge coupled device) zenith telescope on ground

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Embodiment Construction

[0022] Such as figure 1 As shown, the astronomical positioning method provided by the present invention comprises the following steps:

[0023] Level the telescope. After the CCD zenith telescope is placed at the observation point, the leveling system will precisely level the telescope according to the data of the high-precision inclinometer, so that the horizontal state of the telescope is within a given range.

[0024] Carry out the first imaging of the sky area near the zenith of the observation point. The electronic control system reads the measurement data of the high-precision inclinometer and transmits it to the computer; the CCD zenith telescope performs the first imaging of the sky area near the observation point zenith; the electronic control system of the telescope reads the second pulse provided by the atomic clock or the radio timing system Signal and precise time information, the second pulse is used as the CCD exposure trigger signal, the CCD is exposed with a...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01C21/02
CPCG01C21/02
Inventor 王博田立丽王政韩延本王红旗尹志强刘卫东乔琪源
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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