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Quick data processing method of occultation event of parallel asterism

A technology of paralleling planets and events, applied in the field of navigation satellite applications and parallel computing, to achieve the effects of simple method, improved work efficiency, and low construction cost

Inactive Publication Date: 2010-10-27
WUHAN UNIV
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Problems solved by technology

This aspect provides unprecedented global coverage data for (space) weather forecasting, but also poses a challenge for the computational performance of processing systems

Method used

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  • Quick data processing method of occultation event of parallel asterism
  • Quick data processing method of occultation event of parallel asterism
  • Quick data processing method of occultation event of parallel asterism

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Embodiment Construction

[0032] Because when calculating the occultation event information that constitutes the high-orbit (GNSS) and low-orbit (LEO) satellite pairs, there is no logical relationship between the satellite pairs in calculation. So the calculation of each satellite pair is independent. Based on this foundation, parallel computing can be realized efficiently.

[0033] When specifically calculating the position of the occultation event, the classic method in the field of occultation is adopted, such as figure 1 As shown, taking the GNSS system GPS that has been implemented as an example: the precise positions of GPS satellites and LEO satellites are known, and the distance from the center of the earth to the vertical line segment with the instantaneous vectors of GPS and LEO is the standard for judging whether an occultation signal is generated. If the distance is greater than the threshold value of the earth's radius plus the highest ground height of the occultation event, this judgment...

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Abstract

The invention relates to the technical fields of the application and the parallel computation of a navigational satellite, in particular to a quick computation method of an occultation event of a parallel asterism. The method comprises the following steps of: navigating constellations, reading occultation asterism information, distributing satellite pairs according to an obtainable computation core, computing occultation event information accurately and finally, storing as an information file for subsequent occultation data processing. The method provided by the invention is applied to an occultation data processing system, is especially applied to the preprocessing process of a near-real-time (3 to 6h) occultation data processing system for computing the important part of the occultation event information, can enhance the computation efficiency of the process greatly and reduces the computation time greatly, thereby providing quicker data guarantee to the near-real-time application of occultation data applied to weather forecast and space weather forecast.

Description

technical field [0001] The invention relates to the technical field of navigation satellite applications and parallel computing, in particular to a fast data processing method for parallel planet group occultation events. Background technique [0002] Radio occultation technology was first used in astronomy to detect the atmospheric state of planets. The development history of planetary atmosphere detection was described in detail in Reference 1 (see Document 1). In 1965, Fischbach proposed to apply this technology to the earth Atmospheric detection thought (see document 2); Since then, Hardy et al. have carried out a large amount of theoretical research and simulation calculation work (see document 3), the successful construction of the US Global Positioning System (GPS, Global Positioning System) constellation in the early 1990s and Running facilitates the application of this idea in practice. [0003] The use of GPS radio occultation technology to detect the state of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/95G01S19/00G06F15/16
CPCY02A90/10
Inventor 罗佳徐晓华
Owner WUHAN UNIV
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