Satellite starlight refraction navigation error determination and compensation method

Abstract

The invention relates to a satellite starlight refraction navigation error determination and compensation method. The method comprises the following steps: firstly, generating data of a satellite orbit by virtue of STK software; establishing a satellite attitude planning model; determining an actual observation visual field, and simulating an observation star map comprising refraction stars and non-refraction stars; calculating to obtain the tangential height h of the refraction stars; calculating to obtain the tangential height h'' of the refraction stars with errors of refraction angles and errors of an atmospheric model, wherein tangential height errors are mainly caused by the measurement precision errors of the refraction angles and the errors of the atmospheric model; calculating to obtain the position of a satellite under a geocentric inertial coordinate system; and performing filtration by an extended Kalman filtration method, and outputting a starlight refraction navigation estimated position and position errors. The method provided by the invention can realize accurate prediction of navigation precision of a satellite starlight refraction navigation system, and is comprehensive in error analysis and accurate and reliable in results.

Description

technical field [0001] The invention belongs to the field of astronomical navigation, and relates to a satellite starlight refraction navigation error determination and compensation method, which is suitable for accurate estimation of the positioning accuracy of a satellite starlight refraction navigation system. Background technique [0002] Starlight refraction astronomical navigation is a method of using optical sensors to measure the refraction of starlight when it passes through the atmosphere at the edge of the earth, indirectly obtain horizon information, obtain the position of the satellite in the geocentric coordinate system, and determine the orbit of the satellite. Since the concept of starlight refraction navigation was proposed in 1982, it has attracted the attention of many scholars, and many navigation accuracy analysis methods have been proposed, but Robert, Robert and Eliezer (Guidance and Control Conference, Gatlinburg, TN, August 15-17, 1983: 359-367), Whi...

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Problems solved by technology

Since the concept of starlight refraction navigation was proposed in 1982, it has attracted the attention of many scholars, and many navigation accuracy analysis methods have been proposed, but Robert, Robert and Eliezer (Guidance and Control Conference, Gatlinburg, TN, August 15-17, 1983: 359-367), Whilte, Thurman and Barnes (Proceedings of the Forty-First Annual Meeting, the Institute of Navigation, Annapolis, MD, June 25-27, 1985:83-89), Lair and Duchon (Acta Astronautica, 1988, 17(10):1069-1079), Ning and Fang (Aerospace Science and Technology 11(2007): 222-228) and other major researchers have not fully analyzed several major factors affecting the navigation accuracy of starlight refraction. Error sources, only the influence of some main error sources on navigation accuracy is analyzed, and the influence of these error sources on navigation accuracy is not considered comprehensively, which cannot meet the needs of satellite starlight refraction navigation system for accurate prediction of navigation accuracy

[0003] Chinese Patent Publication No. CN 103616028A, dated March 5, 2014, titled "A Method for Autonomous Navigation of Starlight Refraction Satellites Based on a Single-Star Sensor", discloses a method based on a single-star sensor using the principle of starlight refraction The method of satellite autonomous navigation. This method introduces the basic idea of ​​using starlight refraction for satellite autonomous navigation, and gives the simulation results of navigation accuracy. Although high-precision navigation accuracy is obtained, it is not based on a comprehensive analysis of errors. Basically, there is a certain gap between the results and the actual situation, and it cannot meet the needs of the satellite starlight refraction navigation system for accurate prediction of navigation accuracy.

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