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A method and device for determining the position error of a synthetic aperture radar carrier

A technology of synthetic aperture radar and airborne aircraft, which is applied in the directions of measurement devices, radio wave reflection/re-radiation, and re-radiation, and can solve the problems of SAR airborne aircraft position errors, increased costs, and navigation systems that cannot work normally, and achieve Avoid navigation system, cost saving effect

Active Publication Date: 2016-04-06
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] At present, a navigation system is usually installed on the SAR, such as an inertial measurement unit (Inertial Measurement Unit, IMU) or a global positioning system (Global Positioning System, GPS). The position error of the machine, but this will greatly increase the cost
In addition, the navigation system may not work properly, and at this time, it is impossible to obtain reliable position information of the carrier aircraft

Method used

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  • A method and device for determining the position error of a synthetic aperture radar carrier
  • A method and device for determining the position error of a synthetic aperture radar carrier
  • A method and device for determining the position error of a synthetic aperture radar carrier

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Embodiment Construction

[0033] The invention provides a method for determining the position error of a SAR carrier aircraft, such as figure 1 As shown, the method includes:

[0034] Step 101, selecting at least two strong scattering ground target points according to the radar echo data;

[0035] Step 102, respectively detecting the range migration (RangeCellMigration, RCM) trajectory of each ground target point;

[0036] Step 103, calculate and obtain the position error of the SAR carrier aircraft according to the detected RCM trajectories.

[0037] Preferably, said selecting at least two ground target points according to the radar echo data is:

[0038] Select at least two strong scattering ground target points according to the radar echo data;

[0039] Correspondingly, the RCM tracks of the respective ground target points detected are:

[0040] The RCM trajectory of each strong scattering ground target point is detected respectively.

[0041] Preferably, said selecting at least two strong scat...

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Abstract

The invention discloses a method and device for determining a position error of a synthetic aperture radar (SAR) carrier aircraft. The method includes the steps that at least two ground target points are selected according to radar return data; the range migration (RCM) track of each ground target point is detected; the position error of the SAR carrier aircraft is obtained through calculation according to each detected RCM track. The position error of the SAR carrier aircraft can be determined without the additional installation of a guided system, so that cost is saved.

Description

technical field [0001] The invention relates to radar echo data processing technology, in particular to a synthetic aperture radar (Synthetic Aperture Radar, SAR) carrier aircraft position error determination method and device. Background technique [0002] The SAR mounted on the aircraft can obtain images of ground targets through pulse radar. Due to airflow and other factors, the actual track of the SAR carrier (aircraft equipped with SAR) will deviate from the preset ideal track (that is, uniform linear motion), namely There will be errors in the position of the SAR carrier aircraft. In order to obtain accurate images of ground targets through motion compensation, it is necessary to determine the position error of the SAR carrier aircraft. [0003] At present, a navigation system is usually installed on the SAR, such as an inertial measurement unit (Inertial Measurement Unit, IMU) or a global positioning system (Global Positioning System, GPS). The position error of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/06
Inventor 高阳禹卫东王宇李宁金日初
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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