Acta Photonica Sinica ›› 2019, Vol. 48 ›› Issue (10): 1001001-1001001.doi: 10.3788/gzxb20194810.1001001

• Atmospheric and Oceanic Optics • Previous Articles     Next Articles

Parameter Design and Performance Analysis of Bistatic Helium Lidar System

PAN Ting-yu, SUN Dong-song, ZHAO Ruo-can, LAN Jia-xin, HAN Yu-li, CHEN Ting-di, XUE Xiang-hui, TANG Lei   

  1. School of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China
  • Received:2019-06-11 Online:2019-10-25 Published:2019-07-11
  • Contact: 2019-07-11 E-mail:sds@ustc.edu.cn
  • Supported by:

    The National Natural Science Foundation of China (Nos. 41774193, 41574180)

Abstract:

According to the atmospheric continuous laser beam imaging technology, the corresponding resolution range for the distance between separated transmitter and receiver on bistatic helium lidar system is obtained, as well as the relationship between the single-row CCD pixels and the altitude, and the variation curve of resolution range with different altitudes. Moreover, the corresponding relation between the number of photons received by the system's single-row pixels and the altitude under different metastable helium densities is analyzed, and the signal to noise ratio and relative error varied with altitude are obtained. The simulation results indicate that the signal to noise ratio can be improved by increasing the integration time. In the range of altitude from 400 km to 1 000 km, when the integration time is 2 h and the range resolution is 50 km, the signal to noise ratio is in the range from 10 to 65 and the relative error is less than 10%. These results prove that adopting the bistatic helium resonance fluorescence lidar system can detect the metastable helium density of the 200~1 000 km thermosphere, which provides a reference for further perfecting and optimizing the scheme of the bistatic helium resonance fluorescence lidar system.

Key words: Atmospheric optics, Helium density lidar, Resonance fluorescence, Thermosphere, Numerical simulation, Remote sensing, Metastable helium

CLC Number: