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Satellite-borne laser radar on-orbit calibration method

A laser radar and spaceborne technology, applied in the field of spaceborne laser radar on-orbit calibration, can solve the problems of low success rate of airborne infrared imaging method, high laying cost, and long calibration cycle

Pending Publication Date: 2022-05-27
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

Each method has its own advantages and disadvantages. Because domestic large-scale surveying and mapping cameras generally use high-stable and large platforms, they are not suitable for satellite attitude maneuver calibration methods; the success rate of airborne infrared imaging methods is low, and the implementation is difficult; High precision, high laying cost and long calibration period

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  • Satellite-borne laser radar on-orbit calibration method
  • Satellite-borne laser radar on-orbit calibration method
  • Satellite-borne laser radar on-orbit calibration method

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Embodiment Construction

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments disclosed in the present invention will be described in further detail below with reference to the accompanying drawings.

[0041] One of the core ideas of the present invention is to provide an on-orbit calibration method for spaceborne laser radar, that is, to lay a target field in a selected calibration area, maneuver into the calibration orbit through the satellite orbit, and use the satellite maneuver and laser light output time to enter the calibration orbit. Adjustment, in the case that the target field is not transferred, the laser spot can be quickly obtained many times to realize the on-orbit calibration of the spaceborne laser radar.

[0042] like figure 1 , in this embodiment, the on-orbit calibration method of the spaceborne lidar includes:

[0043] Step 1, select a calibration area, and lay a target field in the calibration area.

[0044]...

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Abstract

The invention discloses a satellite-borne laser radar on-orbit calibration method, which comprises the following steps: laying a target field in a selected calibration area, entering a calibration orbit through satellite orbit maneuver, and rapidly acquiring laser spots for multiple times through satellite maneuver and laser light emitting time adjustment under the condition that the target field is not transferred, thereby realizing on-orbit calibration of a satellite-borne laser radar. The on-orbit calibration method does not depend on a calibration field and can be applied to satellite-borne laser radar geometric positioning.

Description

technical field [0001] The invention belongs to the technical field of on-orbit calibration of spaceborne laser radar, and in particular relates to an on-orbit calibration method of spaceborne laser radar. Background technique [0002] Due to the vibration of satellite launch, satellite orbit, attitude, time scale, and ranging and pointing errors of lidar ground calibration, spaceborne lidar will reduce the accuracy of laser measurement results as elevation control. Radar parameters are calibrated on-orbit. [0003] At present, the calibration methods used for spaceborne lidar at home and abroad mainly include ground-based detector method, airborne infrared imaging method, terrain-based calibration method, and satellite attitude maneuvering method. Each method has its own advantages and disadvantages. Because domestic large-scale surveying and mapping cameras generally use high stability and large platforms, it is not suitable for the method of satellite attitude maneuver c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/497
CPCG01S7/497Y02A90/10
Inventor 胡震岳景泉冯昊赵利民郭倩蕊刘希刚李少辉
Owner CHINA ACADEMY OF SPACE TECHNOLOGY