星载激光测高仪距离参数地面标定方法

陈露; 高志山; 袁群; 殷慧敏; 朱丹; 刘威剑

doi:10.3788/CO.20191204.0896

Volume 12 Issue 4

Aug. 2019

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Chinese Optics > 2019 > 12(4): 896-904.

CHEN Lu, GAO Zhi-shan, YUAN Qun, YIN Hui-min, ZHU Dan, LIU Wei-jian. Ground calibration method for distance parameters of satellite-borne laser altimeter[J]. Chinese Optics, 2019, 12(4): 896-904. doi: 10.3788/CO.20191204.0896

Citation:

CHEN Lu, GAO Zhi-shan, YUAN Qun, YIN Hui-min, ZHU Dan, LIU Wei-jian. Ground calibration method for distance parameters of satellite-borne laser altimeter[J]. Chinese Optics, 2019, 12(4): 896-904. doi: 10.3788/CO.20191204.0896

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Ground calibration method for distance parameters of satellite-borne laser altimeter

doi: 10.3788/CO.20191204.0896

Institute of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Funds:

National Natural Science Foundation of China 61505080

More Information

Corresponding author: GAO Zhi-shan, E-mail:zhishgao@njust.edu.cn
Received Date: 15 Oct 2018
Rev Recd Date: 10 Dec 2018
Publish Date: 01 Aug 2019

Abstract

Abstract

Satellite-borne laser altimeter measures the distance between a satellite and the earth through processing a laser echo signal collected by its receiving module. A laser echo simulation model for the ground-based distance parameter calibration of satellite-borne laser altimeter is proposed, in which the emission laser pulse and the returned laser pulse with an adjustable time-delay are generated. First, the time-delay value set in the laser echo simulation system was precisely measured by swapping two photodetectors and using a frequency counter, and the measurement error was 113 ps. The calibration of the elevation error is realized by comparing the time-delay set value and the time-delay value obtained in the receiving system. A laser echo simulation system is developed that offers distance simulation ability from 500 km to 550 km with a jitter of 34.5 ps by setting the periodic time-delay from 3 335 640.9 ns to 3 669 205.0 ns. The time-delay accuracy of the laser echo simulation system for the satellite-borne laser altimeter is better than 118 ps and the system can provide a calibration capability better than 6 cm in the range of hundreds of kilometers.
- satellite laser altimeter,
- ground calibration,
- time-delay,
- elevation error

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References(17)

References

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