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Solar flare TDOA (Time Difference Of Arrival) measurement, integrated navigation method and integrated navigation system

A solar flare and time difference technology, which is applied in integrated navigators, radio wave measurement systems, direction/deviation determination electromagnetic systems, etc., can solve the problems of inability to provide high-precision navigation information and low accuracy

Inactive Publication Date: 2016-06-08
WUHAN UNIV OF SCI & TECH
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Problems solved by technology

[0004] In summary, in the case of errors in the ephemeris of the target celestial body, X-ray pulsar navigation and speed measurement navigation cannot provide high-precision navigation information relative to the target celestial body
Although direction finding navigation is not affected by ephemeris errors, its accuracy in the radial direction is extremely low

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  • Solar flare TDOA (Time Difference Of Arrival) measurement, integrated navigation method and integrated navigation system
  • Solar flare TDOA (Time Difference Of Arrival) measurement, integrated navigation method and integrated navigation system
  • Solar flare TDOA (Time Difference Of Arrival) measurement, integrated navigation method and integrated navigation system

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[0097] The technical scheme of the invention can adopt computer software to support the automatic operation process. The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0098] Deep space probes are generally called spacecraft. Spacecraft that fly to Mars may be called Mars rovers.

[0099] The present invention takes the Mars probe as an embodiment, and the same method can be adopted for the probes of other planets in the solar system.

[0100] Firstly, the orbit of the Mars rover is given, as shown in Table 1.

[0101] Table 1 Initial orbital parameters of the Mars rover

[0102]

[0103] The basic principle of solar flare TDOA is as follows: figure 1 shown. Path D is the path of solar flare photons flying directly from the sun to the spacecraft, and path M is the path of solar photons flying to the spacecraft after being reflected by Mars. There are two photodetectors on the Mars rover...

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Abstract

The invention provides solar flare TDOA (Time Difference Of Arrival) measurement, anintegrated navigation method and an integrated navigation system, which belong to the field of spacecraft autonomous navigation. The solar flare TDOA measurement comprises the following steps of acquiring flare arrival time directly from the sun and flare arrival time reflected by the Mars; calculating a difference value between the two flare arrival times; building a solar flare TDOA measurement model. The integrated navigation method comprises the following steps of building a direction-findingnavigation model, building the solar flare TDOA measurement model, utilizing a filter to filter, and adopting the direction-finding model when the solar flare TDOA is not acquired. The solar flare TDOA measurement, and theintegrated navigation method and theintegrated navigationsystem provided by the invention solve the problem of large radial deviation of direction- finding navigation, are high in positioning precision, and have lower requirement on an instrument and ephemeris. Therefore, the solar flare TDOA measurement, and the integrated navigation method and the integrated navigation system provided by the invention has the important practical significance on spacecraftautonomous navigation.

Description

technical field [0001] The invention belongs to the field of spacecraft autonomous navigation, and in particular relates to a solar flare arrival time differential measurement technical solution and a spacecraft autonomous navigation technical solution based on solar flare arrival time information. Background technique [0002] Navigation information is critical to the success or failure of deep space exploration. Affected by long distance and long delay, the ground station cannot provide real-time high-precision navigation information, especially in the capture segment. The spacecraft autonomous navigation system can do this. Therefore, for the capture segment, astronomical autonomous navigation is extremely important, especially the position and velocity information of the spacecraft relative to the target celestial body. [0003] At present, in the field of deep space exploration, there are the following autonomous navigation methods: (1) X-ray pulsar ranging navigation...

Claims

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Application Information

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IPC IPC(8): G01C21/24G01C21/02G01S5/16G01S3/782G01S11/12
CPCG01C21/02G01C21/24G01S3/782G01S5/16G01S11/12
Inventor 刘劲吴谨熊凌邓慧萍
Owner WUHAN UNIV OF SCI & TECH
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