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Method for overcoming deviation of precise orbit determination system of beidou second-generation GEO (geostationary orbit) satellite

A system deviation and precise orbit determination technology, applied in the field of global navigation systems, can solve the problems of inapplicable GEO satellite orbit determination, etc., to improve the accuracy of calculation and prediction, improve the accuracy of orbit determination, and eliminate the clock error of station receivers. Effect

Active Publication Date: 2015-04-29
WUHAN UNIV
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Problems solved by technology

[0004] From the above analysis, the currently widely used MEO orbit determination method is not suitable for high-precision GEO satellite orbit determination

Method used

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  • Method for overcoming deviation of precise orbit determination system of beidou second-generation GEO (geostationary orbit) satellite
  • Method for overcoming deviation of precise orbit determination system of beidou second-generation GEO (geostationary orbit) satellite
  • Method for overcoming deviation of precise orbit determination system of beidou second-generation GEO (geostationary orbit) satellite

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Embodiment

[0032] The basic flow of the embodiment is as follows:

[0033] (1) Input the ionosphere-free combination double-difference ambiguity with a certain common viewing time (recommended to select more than 20 minutes), and each ionosphere-free combination double-difference ambiguity has a corresponding wide-lane double-difference ambiguity and narrow-lane double-difference The ambiguity can be recorded as wide and narrow lane double-difference ambiguity. According to the possibility of fixed ambiguity, the ionosphere-free combined double-difference ambiguity in the station network is divided into two levels: the baseline and the whole network, and the corresponding wide-lane double-difference ambiguity and narrow-lane double-difference ambiguity are selected from the baseline level The wide and narrow lane double-difference ambiguities are all fixed, and then the independent wide and narrow lane double-difference ambiguities are selected based on the entire network level. In inde...

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Abstract

The invention provides a method for overcoming deviation of a precise orbit determination system of a beidou second-generation GEO (geostationary orbit) satellite. According to the method, a fuzzy degree fixation process is used and strict judgment criteria are adopted in the beidou fuzzy degree fixation process to guarantee the success rate of the fuzzy degree fixation process; a space relation between a Y-axis direction of a solar panel and a sunlight incidence direction in a zero-offset state is analyzed; corresponding parameters are set for estimating and absorbing a reflection force in a light pressure model, and a reasonable prior information and experience model is built from posterior long-term observation data, so that an effective background constraint to light pressure parameters in a GEO orbit determination process is formed, the influence due to insufficient geometrical observation conditions and other model errors is avoided, and the orbit determination precision is improved; a clock offset model is built within a time allowed by the frequency stability, a relation between epochs is established, a model constraint is built by adopting an inter-satellite single difference method when a satellite clock of a GEO is modeled, the influence of a receiver clock offset of an observation station is eliminated, the purpose of reducing the correlation is reached, and the resolving and forecast accuracy of the beidou GEO is improved finally.

Description

technical field [0001] The invention belongs to the field of global navigation systems and relates to a technology for precise orbit determination of Beidou second-generation GEO satellites. Background technique [0002] As an important part of the second-generation Beidou satellite navigation system, GEO satellites (Geostationary Orbit Satellites) are of great significance to positioning, timing and navigation in China and other Asia-Pacific regions. Incorporating GEO satellites into the satellite navigation system will significantly increase the number of observable satellites in positioning services, improve the geometric conditions of observation, and improve the performance of positioning services. The technology to improve the accuracy of GEO's precise orbit determination is of great significance to the construction and service of the second-generation Beidou satellite navigation system. [0003] The dynamic orbit determination method adopted by the existing GPS (Glob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/39
Inventor 楼益栋刘杨施闯郑刚
Owner WUHAN UNIV
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