Missile-borne double-base SAR data fusion positioning error correcting method

Abstract

The invention discloses a missile-borne double-base SAR data fusion positioning error correcting method, and relates to the technical field of synthetic aperture radar. The missile-borne double-base SAR data fusion positioning error correcting method comprises the following steps: obtaining a distance and expression between an attack missile, an irradiation missile and a center point of a scene; establishing a state equation of the distance sum; obtaining a ranging expression of the inter-missile data link of the attack missile and the irradiation missile; establishing a state equation of inter-missile data link ranging; establishing a state equation of an inertial navigation system of the attack missile and the irradiation missile; establishing a cooperative positioning state equation anda cooperative positioning observation equation based on distance and constraint, inter- missile data link ranging constraint, attack missile and irradiation missile inertial navigation system constraint, resolving to obtain correction information for compensation, and outputting correction information. According to the missile-borne double-base SAR data fusion positioning error correcting method,positioning error compensation is carried out by establishing a cooperative positioning state equation and a cooperative positioning observation equation based on distance and constraint, inter-missile data link ranging constraint, attack missile and irradiation missile inertial navigation system constraint, so that the positioning accuracy of the missile-borne double-base SAR is improved.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar, in particular to a positioning error correction method for missile-borne bistatic SAR data fusion. 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 ...

AI Technical Summary

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 soug

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