| Issue |
EPJ Web Conf.
Volume 362, 2026
31st International Laser Radar Conference (ILRC 31) Held Together with the 22nd Coherent Laser Radar Conference (CLRC 22)
|
|
|---|---|---|
| Article Number | 04013 | |
| Number of page(s) | 4 | |
| Section | Lidar Measurements in the Stratosphere, Mesosphere, and Thermosphere | |
| DOI | https://doi.org/10.1051/epjconf/202636204013 | |
| Published online | 09 April 2026 | |
https://doi.org/10.1051/epjconf/202636204013
Metastable Helium Density Simulation and Discussion on the Observation Location of Lidar
School of Earth and Space Sciences, University of Science and Technology of China No 96, Jinzhai road, Hefei, Anhui, China
* Correspondence: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 9 April 2026
Abstract
The observation of metastable helium He(23S) by ground-based resonant lidar has been gradually developing. For example, a corresponding lidar has been built in Danzhou, China, and has been observed for several months. More observations may be conducted in the future. So the paper will analyze the advantages and disadvantages of observations at different locations on Earth from the perspective of He(23S) density, mainly using previously generation models of He(23S) density and empirical models of energetic electron (>19.8eV) flux in polar regions. The results show that compared to passive observation conjugate photoelectrons have a significant impact on the observable duration of middle-low latitudes, and the precipitation electrons in polar regions are the main source of He(23S) generation during most nights.
© The Authors, published by EDP Sciences, 2026
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