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Marine radar error calibration-oriented valid target sequence set combined analysis method

An error calibration and error sequence technology, which is applied in the field of joint analysis of effective target sequence sets for marine radar error calibration, and can solve problems such as measurement result deviation, wrong tracking of targets, and random instability of radar systems.

Inactive Publication Date: 2015-12-02
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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Problems solved by technology

During the calibration data acquisition process, the radar often cannot maintain a high and stable tracking of the target. Due to reasons such as target maneuvering, target density, or target track crossing, it is easy to cause target miss or wrong tracking, and because the radar system may exist Random instability causes large deviations in the measurement results of individual targets. This type of measurement data does not belong to the normal results of radar measurement targets. Therefore, it is necessary to screen such abnormal data, wrongly tracked targets, and wrongly paired targets to improve the error. Confidence in estimated results
At present, there is no research report on the error sequence joint statistical analysis method for marine radar calibration

Method used

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  • Marine radar error calibration-oriented valid target sequence set combined analysis method
  • Marine radar error calibration-oriented valid target sequence set combined analysis method
  • Marine radar error calibration-oriented valid target sequence set combined analysis method

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings. With reference to the accompanying drawings in the description, the specific implementation of the present invention is divided into the following steps:

[0018] (1) The input data is a collection of radar and AIS track point pairs that have completed spatial coordinate transformation and time alignment. The point pairs are expressed in polar coordinates with the radar as the origin, and the corresponding time is the same, that is, each track point The radar track of the pair includes the target batch number ID, distance ρ, bearing θ, time t, and the AIS track includes the ship user identification number MMSI, distance ρ', bearing θ', and time t;

[0019] (2) Calculate distance and azimuth error respectively, obtain the error sequence of distance and azimuth, carry out error analysis respectively to distance error sequence and azimuth error sequence;

[0020]...

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Abstract

The invention discloses a marine radar error calibration-oriented valid target sequence set combined analysis method, the technology relates to the field of marine radar error calibration, utilizes radar and AIS dot pair data, screens abnormal values, and removes wrong target pairs, thereby completing estimation of an error. The method is realized mainly through the following technical scheme: first a radar and AIS track dot pair set which completes space coordinate transformation and time alignment is utilized to calculate distance and azimuth errors, thereby obtaining an error sequence of distance and azimuth; then interval screening is performed on the error sequence of a single target, and abnormal values are removed; then a t test with a significance level alpha=0.05 is performed on the statistical quantity of each target error sequence and the statistical quantity of all the rest of target error sequences, and wrong target pairs are removed; and finally, a mean value of the error sequences is calculated, thereby obtaining an error estimation result.

Description

1. Technical field [0001] The present invention relates to the research direction of joint analysis of effective target sequence sets in the field of marine radar error calibration. It utilizes the real-time data received by shore station AIS equipment as the true value of the target, and carries out the data analysis stage of marine radar error calibration to obtain marine The error estimation results of the radar are suitable for error calibration of sea surface target detection radars such as navigation, search, warning, and target indication under the conditions of shore-based and ship-borne platforms. 2. Background technology [0002] AIS, namely Automatic Identification System, is a communication response device used to assist the ship traffic management system. The facility can automatically broadcast and receive ship dynamic, static and navigation-related data by means of self-organizing time-division multiple access. AIS has been widely used in the field of navigat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 关键孙璐王国庆朱红鹏孙艳丽刘宁波周伟
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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