Metastable He 1083 nm intensities in the twilight: A reconsideration | Zendy

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Metastable He 1083 nm intensities in the twilight: A reconsideration

Author(s) -

Bishop James,

Link Richard

Publication year - 1993

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/93gl01117

Subject(s) - airglow , metastability , twilight , helium , atomic physics , physics , scattering , computational physics , diffusion , photon , aeronomy , atmosphere (unit) , line of sight , atmospheric sciences , optics , astrophysics , meteorology , astronomy , thermodynamics , quantum mechanics

The 1083 nm airglow emission arising from the resonant scattering of solar photons by metastable He(2³ S ) atoms is potentially valuable for remote sensing of total photoelectron fluxes and neutral helium densities at altitudes above the F 2 peak. In this study, we adopt the diffusion picture used in all previous studies and point out that even within this crude approach, intensities consistent with the winter observations (≳1000 R) collected in Tinsley and Christensen [ J. Geophys. Res., 81 , 1253, 1976] are obtained when the correct parameter values for He(2³ S ) production, loss, and transport are applied and line‐of‐sight geometries are properly taken into account.

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