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Attitude determination method based on double short baselines of navigation satellite signals

A navigation satellite and short baseline technology, applied in the field of navigation measurement, can solve the problems of satellite navigation signals that cannot be measured and applied, and achieve the effect of shortening the length and expanding the scope of application.

Active Publication Date: 2021-11-16
中国人民解放军63620部队
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for determining attitude based on the double short baselines of navigation satellite signals, which controls the length of the measurement baseline within half a wavelength of the satellite downlink carrier signal, and solves the problem that satellite navigation signals cannot be used in small and micro target attitudes. Difficulties in measuring applications

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  • Attitude determination method based on double short baselines of navigation satellite signals
  • Attitude determination method based on double short baselines of navigation satellite signals
  • Attitude determination method based on double short baselines of navigation satellite signals

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0037] Use the 4 navigation satellite signal receiving antennas on the target to form two mutually perpendicular measurement baselines, the length of each measurement baseline is D, in order to minimize the length of the measurement baseline, the length should not exceed the shortest wavelength of the navigation satellite navigation wave Half, for the existing global navigation system, D≤95mm is desirable.

[0038] Mark the navigation satellite that can receive the navigation signal as S i (i=1,2,3,...,N), the position coordinates of these navigation satellites in the geocentric coordinate system are X i =(x i ,y i ,z i ), the wavelength corresponding to the center frequency of the j-th navigation radio wave of the i-th navigation satellite is λ ij (j=1,...,M i ), M i Indicates the total number of center frequencies of navigation radio waves possessed ...

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Abstract

The invention belongs to the technical field of navigation measurement and satellite navigation application technology, and discloses an attitude determination method based on double short baselines of navigation satellite signals. This method first establishes the estimation model of the direction vector of the two measured short baselines in the geocentric coordinate system; secondly, calculates the estimation model of the direction vector of the two measured short baselines in the geocentric coordinate system; then calculates the two measured short baselines at Estimation of the direction vector in the local north sky east coordinate system; then calculate the target body coordinate system Y 1 The direction vector of the coordinate axis in the geocentric coordinate system and the direction vector in the local North Tiandong coordinate system; finally calculate the estimated attitude angle of the target. The invention controls the length of each measurement baseline within half a wavelength of the satellite downlink carrier signal, which solves the problem that satellite navigation signals cannot be used in the measurement of small and micro target attitudes, thereby enabling more and more navigation in space The navigation signal of the satellite is directly used in the attitude determination of the tiny target, which expands the scope of application.

Description

technical field [0001] The invention belongs to the technical field of navigation measurement and satellite navigation application technology, and relates to an attitude determination method based on double short baselines of navigation satellite signals. Background technique [0002] At present, the target attitude measurement methods based on navigation satellite signals in practical applications all require measurement baselines with a length of meters or even more than ten meters, so that the current attitude determination applications of satellite navigation information are concentrated on large targets, while small and micro targets cannot Perform target attitude measurement, which largely limits the application of satellite navigation signals in target attitude measurement. For all current shelf products based on navigation satellite signal attitude determination, when the measurement baseline is less than one wavelength of the navigation satellite downlink carrier si...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/54
CPCG01S19/54
Inventor 陈德明马丽张墨王婷婷
Owner 中国人民解放军63620部队
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