Spaceborne lidar echo signal simulator

A laser radar and echo signal technology, applied in the field of photoelectric information, can solve the problems of high cost, poor repeatability of test data, limitations of meteorological conditions and environmental conditions, etc., and achieve the effect of low test cost

Active Publication Date: 2021-02-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

The problems of this kind of simulator are: the cost of the field test is high, the test is limited by the weather conditions and environmental conditions, and the repeatability of the test data is poor

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  • Spaceborne lidar echo signal simulator
  • Spaceborne lidar echo signal simulator
  • Spaceborne lidar echo signal simulator

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Embodiment Construction

[0035] In order to better illustrate the purpose and advantages of the present invention, the content of the invention will be further described below in conjunction with the accompanying drawings and examples.

[0036] The parameters of the measured spaceborne laser radar system that the spaceborne laser radar echo signal simulator disclosed in this embodiment mainly include: the wavelength includes 532nm and 1064nm, and the 532nm wavelength is mainly used for detecting atmospheric aerosols, and the laser echo needs to be simulated The depolarization effect of the signal, the 1064nm wavelength is used to measure the surface elevation, and there is no need to simulate the depolarization effect of the laser echo signal. The emitted laser pulse width is 20ns, the single pulse energy is 150mJ, and the repetition frequency is 20Hz. The emitted laser beam has a diameter of 180 mm and a divergence angle of 100 μrad. The aperture of the receiving telescope of the lidar is 1m, the re...

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Abstract

The invention relates to a space-borne laser radar echo signal simulator, which is mainly used in the space-borne laser radar ground test and belongs to the field of photoelectric information technology. The simulator consists of a control computer, a waveform simulation device, a polarization state simulation device, a noise simulation device, an optical beam combining device, a beam deflection device, a relay image plane, a collimator and a laser direction tracking device; the simulator provides a The controllable optical signal source can provide controllable optical echo signals for the spaceborne lidar system under test under laboratory conditions, and support repeated testing of the spaceborne lidar system. It can support the whole process of spaceborne lidar system development, hardware testing, error evaluation and algorithm development. It has strong practicability and has been applied in the ground test of a spaceborne earth observation lidar system in China.

Description

technical field [0001] The invention relates to a space-borne laser radar echo signal simulator, which is mainly used in the space-borne laser radar ground test and belongs to the field of photoelectric information technology. Background technique [0002] Space-borne lidar is an effective means for global atmospheric detection and global geographic information. It is not restricted by region and time, and can achieve all-weather observation. At present, multiple spaceborne lidar systems have been launched or planned to be launched around the world, such as the GLAS system carried on the US ICESat satellite, the ATLAS system carried on the US ICESat-2 satellite, the CALIOP system carried on the US CALIPSO satellite, and the international The CATS system on the space station, the ALADIN system on the European AEOLUS satellite, the SACDL system on the HSRL atmospheric environment monitoring satellite to be launched by China, etc. The target information detected by spaceborne ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/497G01S17/88
CPCG01S7/497G01S17/88
Inventor 高彦泽李卓王欣宋健闫鸿李霁恬李琦峰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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