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A missile-borne dual-base SAR data fusion positioning error correction method

A positioning error and data fusion technology, applied in the direction of instruments, measuring devices, and using re-radiation, can solve the problems of not being able to rely on GPS and being susceptible to interference

Active Publication Date: 2021-05-04
THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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Problems solved by technology

[0004] Therefore, GPS is susceptible to interference and cannot be relied upon during wartime. In the absence of GPS, methods should be sought to improve the positioning accuracy of weapons to meet the special requirements of the application of missile-borne bistatic SAR platforms

Method used

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  • A missile-borne dual-base SAR data fusion positioning error correction method
  • A missile-borne dual-base SAR data fusion positioning error correction method
  • A missile-borne dual-base SAR data fusion positioning error correction method

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Embodiment Construction

[0048] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0049] see figure 1 As shown, the embodiment of the present invention provides a missile-borne bistatic SAR data fusion positioning error correction method for error correction of the positioning of the attack bomb and the irradiation bomb in the missile-borne bistatic SAR system, including the following steps:

[0050] Obtain the distance and expression between the attack bomb and irradiation bomb and the center point of the scene;

[0051] Establish the state equation of the sum of the distance between the attack bomb and the irradiation bomb and the center point of the scene;

[0052] Obtain the ranging expression of the data link between bombs of attack bombs and irradiation bombs;

[0053] Establish the state equation of the distance measurement of the data link between the attack bomb and the irradiation bomb;

[0054] Establish the sta...

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Abstract

The invention discloses a positioning error correction method for missile-borne bistatic SAR data fusion, and relates to the technical field of synthetic aperture radar. The method includes obtaining the distance and expression between the attack bomb and the irradiation bomb and the center point of the scene; establishing the state equation of the distance sum ;Obtain the ranging expression of the data link between the attack bomb and the irradiation bomb; establish the state equation of the data link ranging between the bomb; establish the state equation of the inertial navigation system of the attack bomb and the irradiation bomb; The data link ranging constraint, the co-location state equation and the co-location observation equation constrained by the inertial navigation system of the attack bomb and the irradiation bomb are solved, the correction information is obtained for compensation, and the correction information is output. This method compensates the positioning error by establishing the cooperative positioning state equation and the cooperative positioning observation equation based on the distance and constraints, the distance measurement constraints of the missile data link, the inertial navigation system constraints of the attack bomb and the irradiation bomb, and improves the accuracy of the missile-borne bistatic SAR. positioning accuracy.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar, in particular to a method for correcting a bomb-borne bistatic SAR data fusion positioning error. Background technique [0002] Compared with single-base SAR, bistatic SAR can obtain more target information, and can also improve the system's anti-destruction and anti-stealth properties. It has broad application prospects in the fields of terrain mapping, battlefield surveillance, and ground moving target reconnaissance. . Due to the separation of the attack bomb and the irradiation bomb, the missile-borne bistatic SAR can realize the high-resolution Doppler azimuth of the irradiation bomb irradiating the target area, and the high-resolution two-dimensional radar image terminal guidance of the attack bomb facing the target area. However, when there is an error in the motion parameters provided by the navigation system, the positioning of the attack bomb and the irradiation bomb w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
Inventor 杨凯新吴丰阳陈术涛罗雪平王春联胡奇沈志闫士杰蔡昔
Owner THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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