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ADS-B (automatic dependent surveillance broadcast) and radar combined system error estimation method

A technology of ADS-B and joint system, which is applied in the field of ADS-B and radar information fusion, and can solve problems such as time alignment error estimation

Inactive Publication Date: 2012-09-26
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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Problems solved by technology

The present invention mainly solves the problem of establishing a joint system error estimation model of ADS-B and radar when there is no time alignment between ADS-B and radar data, and at the same time solves the problems of time alignment and radar system error estimation

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  • ADS-B (automatic dependent surveillance broadcast) and radar combined system error estimation method
  • ADS-B (automatic dependent surveillance broadcast) and radar combined system error estimation method
  • ADS-B (automatic dependent surveillance broadcast) and radar combined system error estimation method

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Embodiment Construction

[0009] 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:

[0010] (1) ADS-B and radar coordinate conversion Equation Chapter 1 Section 1

[0011] ADS-B equipment obtains precise location information through its own GPS, using geographic coordinates (L A ,λ A , H A ) to represent, where L A Indicates the latitude, λ A Indicates the longitude, H A Indicates the height based on the reference ellipsoid, ie altitude. The target measurement obtained by the radar is a local coordinate system centered on the radar. It is necessary to convert ADS-B and radar to a unified coordinate system.

[0012] Let the geographic coordinates of the radar be (L s ,λ s , H s ), the ECEF Cartesian coordinates are (x s ,y s ,z s ),but

[0013] ...

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Abstract

The invention discloses an ADS-B (automatic dependent surveillance broadcast) and radar combined system error estimation method, which belongs to the technical field of ADS and radar information fusion. At present, when the ADS-B equipment is used for radar calibration, the existing serious problem is that the time when the ADS-B emission equipment emits data information cannot be obtained, and no time alignment exists for the radar measuring data and the ADS-B data, so that the following error calibration is inaccurate, while all the conventional algorithms evade the problem. Aiming to effectively solve the problems of time alignment and error estimation of the radar system in the practical application, the method provided by the invention has the following steps of defining a novel ADS-B time system error based on the receiving time of the ADS-B, building the ADS-B and radar system error combined estimation model, and finally solving through the Least Squares algorithm, so that the radar can be accurately calibrated through the ADS-B.

Description

1. Technical field [0001] The invention belongs to the technical field of ADS-B and radar information fusion, and is suitable for a military radar calibration system equipped with ADS-B receiving equipment. 2. Background technology [0002] In the radar networking system, due to the system error of the sensor, the obtained radar target measurement is very inaccurate and often deviates from the real target position, which brings great difficulties to the further information fusion of the fusion center. In practice, the system error elimination of a single radar is usually calibrated by flying the aircraft with GPS equipment according to the established track. real-time processing, etc. Considering that civil aviation airliners are equipped with air traffic control broadcast automatic dependent surveillance system (Automatic Dependent Surveillance Broadcast, ADS-B), and ADS-B equipment can broadcast the precise position information of civil aviation aircraft obtained through ...

Claims

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Application Information

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IPC IPC(8): G01S7/40
Inventor 何友王国宏朱洪伟唐小明王海鹏
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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