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A Space Synchronization Method for Bistatic Synthetic Aperture Radar with Unknown Target Position Coordinates

A technology of synthetic aperture radar and target location, which is applied in the directions of measuring devices, radio wave reflection/re-radiation, and utilization of re-radiation, etc., which can solve problems such as difficult effective application and limited application range

Inactive Publication Date: 2017-01-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The disadvantage of this method is that before the antenna beam pointing control, the accurate WGS-84 coordinate parameters (including longitude, latitude and altitude) of the point target must be obtained, and in this method, the transmitter and receiver adopt In the same coordinate transformation algorithm, the WGS-84 coordinates of point targets are an indispensable input parameter in the coordinate transformation algorithm; in practical applications, bistatic SAR needs to image any area, and when the accurate coordinate position parameters of these areas This method cannot be processed when it is unknown; in addition, since this method only images point target areas with definite coordinate position parameters, its application range is severely limited. The coordinates are required to be accurate, and it is difficult to be effectively applied in practice.

Method used

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  • A Space Synchronization Method for Bistatic Synthetic Aperture Radar with Unknown Target Position Coordinates
  • A Space Synchronization Method for Bistatic Synthetic Aperture Radar with Unknown Target Position Coordinates
  • A Space Synchronization Method for Bistatic Synthetic Aperture Radar with Unknown Target Position Coordinates

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Embodiment Construction

[0061] Initialization process: the initialization parameters of the transmitter are: azimuth and elevation angle (β TS , β TP )=(41.04°, -88.27°); longitude, latitude and altitude (λ T , L T , H T )=(104°, 30°, 5111m); heading angle, pitch angle and roll angle (ψ T , θ T , gamma T )=(90°, 0°, 0°); the corresponding ground altitude H under the orthographic projection of the transmitter g =250m. The initialization parameters of the receiver are: longitude, latitude and altitude (λ R , L R , H R )=(104°, 30°, 4361m); heading angle, pitch angle and roll angle (ψ R , θ R , gamma R )=(90°, 0°, 0°); the corresponding ground altitude H under the receiver’s orthographic projection g =250m; after that, transmitter A and receiver B respectively follow the steps below:

[0062] Transmitter A:

[0063] Step A 1 .determines the unit direction vector the antenna is pointing at Input antenna pointing (angle) parameters (β TS , β TP ), to complete the antenna beam alignment...

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Abstract

The invention belongs to the bistatic synthetic aperture radar space synchronization method with unknown target position coordinates in the technical field of BiSAR emission and reception. Including initialization processing and for the transmitter: determine the unit direction vector carrier coordinate system of the antenna pointing to and the conversion of the geographic coordinate system vector, determine the vector from the transmitter to the center of the target area, convert the geographic coordinate system and the earth coordinate system, and determine the transmitter in the The vector in the earth coordinate system, determine the position vector of the center of the target area For the receiver: determine the position vector of the receiver in the earth coordinate system, determine the receiver pointing to the center of the target area, determine the pointing vector in the geographic coordinate system, determine the vector in the carrier coordinate system The pointing vector accomplishes the spatial synchronization of the receiver and transmitter antenna pointing. The invention has the characteristics of effectively improving the efficiency of bistatic SAR space synchronization, high precision, flexible flight mode, and favorable for wide application.

Description

technical field [0001] The invention belongs to the technical field of bistatic synthetic aperture radar (Bistatic Synthetic Aperture Radar, BiSAR) transmission and reception; in particular, a method for spatial synchronization of bistatic synthetic aperture radar when the exact coordinate position of a target is unknown. Background technique [0002] Synthetic Aperture Radar (SAR) has excellent performance in all-day and all-weather high-resolution imaging and precise positioning of terrain features or ground targets. However, since the launching platform and receiving platform of monostatic SAR share the same carrier, its concealment is poor, and it is easy to be detected and interfered by the enemy. Bistatic Synthetic Aperture Radar (Bistatic Synthetic Aperture Radar, BiSAR) launch platform and receiving platform are placed on different carriers, which can obtain richer target information and longer range than monostatic SAR. At the same time, since the receiving platfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/28G01S13/90
CPCG01S7/02G01S13/90G01S13/9058H01Q3/00H01Q3/08
Inventor 张顺生眭明张伟宗竹林康怀祺
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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