Seasonal and Altitude Dependence of Thermospheric Metastable Helium Densities Measured by Fluorescence Lidar
Abstract Airglow originating from metastable helium He(23S) at 1,083 nm has been used to study the upper thermosphere since its discovery in 1959, yielding insights into, for example, solar EUV intensities and thermospheric photoelectron densities. For over 6 decades, these measurements were made pa...
| Published in: | Geophysical Research Letters |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-01-01
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| Subjects: | |
| Online Access: | https://doi.org/10.1029/2024GL112885 |