Successful launch measurement of the first domestically-observed laser rangefinder

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[China Instrument Network Instrument R&D] The first home-made ground observation laser rangefinder was lifted and successfully measured. This marks a major step forward in the field of space exploration and navigation in China.

Recently, with the launch of China's first ground-based observation laser range finder, which was launched on the 3rd resource of China’s No. 2 star, the measurement of ground-based measurements and the acquisition of echo data are real and effective. The laser rangefinder is independently developed by the China National Aerospace Science and Technology Corporation's No. 508 Institute of Technology. It has complete independent intellectual property rights. Its success on the track marks a new step in China's laser application technology.

The resource No. 3 star laser rangefinder can achieve a measurement accuracy of 1 meter at an orbit altitude of 500 kilometers. Using it to shoot a laser beam from the satellite, by measuring the time and angle of the laser reentry run, it is possible to calculate the relative height of a point on the surface of the ground and obtain the characteristic information of the surface.

The laser range finder can assist the resource No. 02 star payload for stereo mapping. Because it can improve the elevation accuracy of the three-dimensional mapping of the visible light camera, and then help the satellite to measure the height of the observation object more accurately, and improve the measurement accuracy of the global three-dimensional terrain in China.

In order to verify the performance of the laser rangefinder on the ground, the 508 has calibrated its system detection sensitivity and timing accuracy, verified its range and accuracy, and conducted different atmospheric conditions and grounds. In the performance test of the target under the target conditions, environmental tests such as EMC, mechanics, thermal cycling, and thermal vacuum were conducted, and the performance of the laser distance meter was fully tested.

As China's first laser rangefinder to measure the ground, the resource number 02 star laser range finder can accumulate effective measurement data, and lay the technical foundation for the development of subsequent laser range finder for spaceborne earth observation.

This product and technical achievement can be widely used in satellite-to-earth active remote sensing, space target detection and space navigation and other technical fields, to achieve three-dimensional imaging of the measured target, space target tracking and monitoring, has broad application prospects.

(Original title: China's first ground observation laser rangefinder on-orbit boot)

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