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High‐resolution Fabry‐Perot Observations of mesospheric OH (6‐2) emissions
Author(s) -
P. A. Greet,
J. Innis,
P. L. Dyson
Publication year - 1994
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 - 10.1029/94gl00894
Subject(s) - fabry–pérot interferometer , spectrometer , emission spectrum , mesosphere , airglow , lambda , resolution (logic) , atmospheric sciences , spectral line , physics , environmental science , spectral resolution , astrophysics , optics , astronomy , stratosphere , wavelength , artificial intelligence , computer science
Over the 1992/93 summer the Fabry‐Perot spectrometer at Mawson, Antarctica (67.6°S, 62.9°E), was modified to permit observations of two lines in the OH (6–2) band near λ 840 nm. Preliminary observations were obtained on 5 nights in early February. Analysis of these lines, permitting estimates of mesospheric winds and temperatures, will be presented. Lambda‐doubling of OH (6–2) Q 1 (2) and P 1 (3) lines was measured to be 5.50±0.01 pm and 19.17±0.06 pm respectively. The results show that mesospheric temperatures can be obtained from Q 1 (2) profiles even though the doublet is not fully resolved. This emission is significantly more intense than the P 1 (3) emission so its use will allow better resolution of temporal variations.