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Article (Scientific journals)
Pressure sounding of the middle atmosphere from ATMOS solar occultationmeasurements of atmospheric CO2 absorption lines
Abrams, M. C.; Gunson, M. R.; Lowes, L. L. et al.
1996In Applied Optics, 35 (16), p. 2810-2820
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Keywords :
ATMOS experiment
Abstract :
[en] A method for retrieving the atmospheric pressure corresponding to the tangent pointof an infrared spectrum recorded in the solar occultation mode is described andapplied to measurements made by the Atmospheric Trace Molecule Spectroscopy (ATMOS)Fourier-transform spectrometer. Tangent pressure values are inferred frommeasurements of isolated CO2 lines with temperature-insensitive strengthsby measuring the slant-column CO2 amount and by adjusting the viewinggeometry until the calculated column matches the observed column. Tangent pressuresare determined with a spectroscopic precision of 1\%--3\%,corresponding to a tangent-point height precision of 70--210 m. The totaluncertainty is limited primarily by the quality of the spectra and ranges between4 and 6 (280--420 m) for spectra with signal-to-noise ratiosof 300:1 and between 4 and 10 for spectra with signal-to-noiseratios of 100:1. The retrieval of atmospheric pressure increases the accuracy of theretrieved-gas concentrations by minimizing the effect of systematic errors introducedby climatological pressure data, ephemeris parameters, and the uncertainties ininstrumental pointing.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Abrams, M. C.
Gunson, M. R.
Lowes, L. L.
Rinsland, C. P.
Zander, Rodolphe ;  Université de Liège - ULiège
Language :
English
Title :
Pressure sounding of the middle atmosphere from ATMOS solar occultationmeasurements of atmospheric CO2 absorption lines
Publication date :
1996
Journal title :
Applied Optics
ISSN :
1559-128X
eISSN :
2155-3165
Publisher :
Optical Society of America, Washington, United States - District of Columbia
Volume :
35
Issue :
16
Pages :
2810-2820
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 25 October 2015

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