Method for building space-based pulsar navigation database

A technology of pulsar navigation and construction method, which is applied in the field of spacecraft autonomous navigation, can solve problems such as the construction method of space-based pulsar navigation database that has not yet been retrieved, and achieve the best observation effect

Inactive Publication Date: 2013-12-25
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Method for building space-based pulsar navigation database
  • Method for building space-based pulsar navigation database
  • Method for building space-based pulsar navigation database

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0031] Such as figure 1 Shown, the process that the present invention realizes the construction of space-based pulsar navigation database is:

[0032] (1) Establish single-segment observation accuracy ε and observation period t obs , effective detection area A d and the relationship between the pulse quantity parameter PSR: ε=ε(t obs ,A d ,PSR); the pulse quantity parameter PSR is (δ,α,p f ,W,P,R s , R b ), where δ and α are the angular positions of the pulsar: δ is the declination of the pulsar, α is the declination of the pulsar, and p f Is the pulse ratio, W is the half-height width of the pulse, P is the pulse period, R s is the pulse signal source flow rate, R b is the background noise flow; ε(t obs ,A d ,PSR) calculation formula is:

[0033] ϵ = W [ ...

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Abstract

The invention discloses a method for building a space-based pulsar navigation database. The method comprises the following steps: (1) building a relation among one-section observation precision, observation cycle, effective detection areas and pulsar parameters; (2) building a relation among accumulated observation time, variances of timing residual errors, the effective detection areas and the pulsar parameters; (3) selecting database candidate sources; (4) calculating the accumulated observation time required by the candidate sources in the different effective detection areas within the given var (delta t); (5) selecting optimal database navigation sources; (6) selecting the effective detection areas and distributing the observation time of the optimal database navigation sources; (7) launching a space-based observation satellite which runs around the earth and is used for observing the different optimal database navigation sources according to the distributed observation time and downloading observation data to the ground; (8) fitting the downloaded data to obtain the parameters of each optimal database navigation source, which are mainly used for pulsar navigation calculation of a spacecraft.

Description

technical field [0001] The invention belongs to the technical field of spacecraft autonomous navigation, and relates to a construction method of a space-based pulsar navigation database. Background technique [0002] X-ray pulsar navigation is the most promising breakthrough technology for long-term high-precision autonomous navigation of spacecraft. It has important engineering application value and has attracted the attention of international space agencies. In 2004, the U.S. Department of Defense proposed the X-ray Pulsar Navigation Research Program (XNAV). At present, the feasibility demonstration, key technology breakthroughs and ground verification have been completed, and space flight tests will be carried out on the International Space Station and high-orbit satellites soon. In addition, countries or organizations such as the European Space Agency (ESA), Russia, Germany, Japan, the United Kingdom, India, and Australia have also initiated theoretical methods and exper...

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Application Information

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IPC IPC(8): G01C21/02G06F17/30
Inventor 黄良伟帅平贝晓敏吴耀军陈绍龙陈强张倩
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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