Computer Science
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....5132r&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #5132
Computer Science
Scientific paper
The stratospheric balloon-borne UV-visible spectrometers AMON and SALOMON, which uses stars and Moon as light source, respectively, were involved in the validation of the UV-visible spectrometer GOMOS onboard ENVISAT, which uses also stars as light source. A low spectral resolution UV-visible spectrometer, AMON-RA, is also implanted in the AMON gondola, for the validation of the GOMOS algorithm dedicated to the correction of the chromatic scintillation effect. A flight of SALOMON occurred in September 19, 2002, at mid latitude from Aire sur l’Adour, France. The night-time SALOMON and GOMOS measurements were conducted at the same time (around 21h30 TU) and with a spatial coincidence less than 250 km. Comparison of vertical profiles was done for an altitude in the 15-40 km range. While the global shape of the GOMOS and SALOMON ozone profiles are quite in agreement, the GOMOS NO2 and NO3 profiles are unrealistic when compared to SALOMON profiles. A reanalysis of the GOMOS transmission using algorithms already developed for SALOMON shows that accurate NO2 and NO3 profiles can be retrieved if DOAS technique and dedicated spectral windows are used. An AMON (and AMON-RA) flight and a new SALOMON flight should occurred at high latitude from Kiruna (northern Sweden) in January and March 2003, respectively. The same analyses as for the September 2002 flight will be conducted, including this time the OClO and aerosols extinction coefficient retrievals. Taking into account the effect of the chromatic scintillation on the transmission spectra, recommendations will be proposed in order to improve the GOMOS retrievals.
Berthet Gwenael
Chartier Michel
George Machabeli
Lemaire Thierry
Pepe Francesco
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