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Chinese Journal of Space Science ›› 2020, Vol. 40 ›› Issue (6): 1046-1051.doi: 10.11728/cjss2020.06.1046

• Research Articles • Previous Articles    

Research on Atmospheric Lidar Signal Simulation Based on HITRAN Database

CUI Honglu1,2,3, YAN Zhaoai1,2,3,4, ZHANG Bingyan1,2,3, GUO Wenjie1,2, HU Xiong1,2   

  1. 1 National Space Science Center, Chinese Academy of Science, Beijing 100190;
    2 Key Laboratory of Science and Technology on Environmental Space Situation Awareness,Chinese Academy of Science, Beijing 100190;
    3 University of Chinese Academy of Science, Beijing 100049;
    4 Meteorological Observation Centre of China Meteorological Administration, Beijing 100081
  • Received:2019-04-12 Revised:2020-05-31 Published:2020-12-09

Abstract: Signal simulation is very important for atmospheric lidar research. It provides a basis for the design and development of lidar system. The simulation system in this paper can be used to simulate the lidar echo signal based on the absorption line data in the HITRAN database. It can calculate the absorption spectrum of atmospheric molecules, and the attenuation caused by aerosols. This simulation system can also calculate molecules scatter coefficient with parameters built in LOWTRAN and it can simulate the Signal-to-Noise Ratio (SNR) of the echo signal. The echo signals of 355nm, 532nm and 1064nm are simulated by the simulation system using the lidar equation and these signals agree well with the distribution of aerosols and atmospheric molecules. The simulation results of 532nm are compared with a Rayleigh Doppler lidar measured results and their results are consistent, which shows that the simulation system is reliable. The optical efficiency of this lidar system is roughly evaluated and its value is reasonable. The measured SNR and the simulated SNR are calculated. Their results are similar, so simulated SNR can evaluate the reliability of echo signals.

Key words: Atmospheric detection, Lidar, Simulation calculation

CLC Number: