21 Dec 2022
21 Dec 2022
Status: this preprint is open for discussion and under review for Atmospheric Measurement Techniques (AMT).

Pseudo-random modulation continuous wave narrowband sodium temperature/wind lidar

Xin Fang1,2,3,, Feng Li1,, Lei-lei Sun1, and Tao Li1,2,3 Xin Fang et al.
  • 1Deep Space Exploration Laboratory/School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China
  • 2CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China
  • 3CAS Center for Excellence in Comparative Planetology, University of Science and Technology of China, Hefei, Anhui, China
  • These authors contributed equally to this work.

Abstract. We report the first Pseudo-random Modulation Continuous Wave (PMCW) narrowband sodium temperature/wind lidar developed at the University of Science and Technology of China (USTC). The laser system uses an 1178 nm diode seed-laser and a fiber Raman amplifier with a fiber-coupled Acoustic Optical Modulator (AOM) to generate a narrowband 589.158 nm light with a power output of 1.5 W at v0, v+ and v_ frequencies. Based on an innovative technique and algorithm, the main beam and the residual beam modulated by Electro-Optic Modulator (EOM) with M-code are separately directed to the vertical and eastward directions. The 3-frequency light is designed in timing with the multiple-period 127-bit M-code groups. The uncertainties of the temperature and wind with the vertical and temporal resolutions of 1 km and 30 min/1 hr under the clear-sky condition are estimated to be 5.0 K and 10 m/s, respectively at the sodium peak. The temperature and wind results are in good agreement with those observed by satellite and nearby ground-based meteor radar, demonstrating the reliability of the PMCW narrowband sodium lidar system for measuring mesopause region temperature and wind.

Xin Fang et al.

Status: open (until 10 Feb 2023)

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  • RC1: 'Comment on egusphere-2022-1387', Bifford Williams, 30 Jan 2023 reply

Xin Fang et al.

Xin Fang et al.


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Short summary
We successfully developed the first PMCW-NSL system for simultaneous measurements of the mesopause region temperature and wind. Based on the innovative decoded technique and algorithm for CW lidar, both the main and the residual lights modulated by M-code are used and directed to the atmosphere in the vertical and eastward direction tilted 20° from the zenith. The new PMCW-NSL system can applied for airborne and space-borne purposes.