Open AccessValidation of Millimeter‐wave Atmospheric Sounder (MAS) ozone measurements
Author(s) -
Daehler M.,
Bevilacqua R. M.,
KriebelHamilton D. L.,
Goldizen D.,
Olivero J. J.,
Hartmann G. K.,
Degenhardt W.,
Richards M. L.,
Connor B. J.,
Aellig C. P.
Publication year - 1998
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/98jd01455
Subject(s) - mixing ratio , remote sensing , altitude (triangle) , environmental science , radiometer , latitude , millimeter , extremely high frequency , meteorology , atmospheric sciences , geology , physics , geodesy , optics , mathematics , geometry
This paper discusses the validation of measurements of O 3 distribution in the Earth's atmosphere made by the Millimeter‐wave Atmospheric Sounder (MAS), a component of NASA's ATLAS spacelab shuttle package. Measurements of 184 GHz O 3 emission from the Earth's limb at tangent altitudes between 20 and 80 km were made with a 50 channel radiometer having a spectral resolution of 200 KHz. In three missions the emissions of O 3 , H 2 O, ClO, and O 2 were measured between 70°S and 70°N latitudes. O 3 mixing ratio calculations and error analysis were performed with the Rodgers optimal estimation method. Data binned in 128 s batches yield mixing ratio profiles with an altitude resolution of 7 km at the O 3 peak and an estimated accuracy of 5%. Additional retrievals made with all data from each mission binned in 5° latitude zones yield mixing ratios with about 5 km altitude resolution and somewhat improved accuracy. Comparisons with coincident measurements from other space platforms indicate a general agreement within approximately 5%. The data are publicly available through the German Remote Sensing Data Center.