2-dimensional (2-d) radar error registration two-step algorithm under earth centered earth fixed (ECEF) coordinate system

An error registration and coordinate system technology, applied in the field of two-coordinate radar error registration, can solve the problem of low accuracy of system deviation estimation

Inactive Publication Date: 2012-01-04
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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Problems solved by technology

[0010] The purpose of the present invention is to propose a two-coordinate radar error registration technology based on the ECEF coordinate system to solve the problem of low accuracy of system deviation estimation in the existing two-coordinate radar error registration

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  • 2-dimensional (2-d) radar error registration two-step algorithm under earth centered earth fixed (ECEF) coordinate system
  • 2-dimensional (2-d) radar error registration two-step algorithm under earth centered earth fixed (ECEF) coordinate system
  • 2-dimensional (2-d) radar error registration two-step algorithm under earth centered earth fixed (ECEF) coordinate system

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[0074] The two-coordinate radar error registration method based on the ECEF coordinate system of the present invention will be described in detail below with reference to the accompanying drawings.

[0075] Assume that radars A and B are fixed radars, and their geographic coordinates are [40°113°100m] and [40.5°113.5°300m] respectively. The target moves in a straight line at a uniform speed, and its initial state in the coordinate system with radar A as the fusion center is: [-80km 200m / s 25km 05km 0], and the process noise on the x, y, and z axes is 1m / s respectively 2 、1m / s 2 , 0. The measurement noise standard deviation of the two radars is the same, distance: 200m, azimuth: 0.5°. The system deviations of the two radars are the same, set the distance deviation as 1500m, and the azimuth deviation as 0.04rad. The geometric relationship between the relative position of the radar and the target is as attached figure 2 shown. Set the radar sampling period to 5s, simulate 2...

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Abstract

The invention discloses a two-dimensional radar system deviation estimation algorithm based on an earth centered earth fixed (ECEF) coordinate system, and belongs to the field of radar data processing. An ECEF coordinate conversion formula cannot be directly used because a two-dimensional radar lacks height information of a target, so error registration can only be performed in a plane; and when the distance between the target and the radar is relatively long, the accuracy of error registration can be affected because an extremely large coordinate conversion error is caused by a registration method in the plane due to the influence of earth curvature. By the algorithm, actual problems are solved. The algorithm comprises the following steps of: supposing that the height of the target measured by two radars is zero; performing error registration by using the ECEF coordinate conversion formula to obtain a primary estimation value; and correcting an estimation result by a correction algorithm. By the algorithm, the estimation accuracy of radar system deviation can be effectively improved, and the engineering is easy to implement; and the algorithm has promotion and application values, can be used for error registration of radar sensors, electric synthetic method (ESM) sensors, infrared sensors, identification friend or foe (IFF) sensors and the like and can also be applied to data processing of related fields of medicine, traffic and the like.

Description

technical field [0001] The invention relates to a two-coordinate radar error registration method, in particular to an error registration method for two-coordinate radar within a larger battlefield space Background technique [0002] Systematic errors are ubiquitous in various radars and cannot be completely eliminated by themselves. Its existence makes it possible for the fusion center to report missing or false targets when the fusion center fuses the target information reported by each radar, which seriously affects the correct judgment of the battlefield situation, thereby affecting the cooperative combat capability and the maximum effectiveness of each weapon system. Therefore, error registration technology is needed to estimate the system deviation of each radar, so as to compensate the radar detection error and obtain more accurate target information. For the error registration technology, the selection of the common coordinate system should be considered first. For ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
Inventor 王国宏陈垒刘德浩贾舒宜
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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