New performances of the UV-visible spectrometer "SALOMON" dedicated to measurements of night-time stratospheric trace gas species

Details New performances of the UV-visible spectrometer "SALOMON" dedicated to measurements of night-time stratospheric trace gas species New performances of the UV-visible spectrometer "SALOMON" dedicated to measurements of night-time stratospheric trace gas species

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.471..623b&link_type=abstract

In: 15th ESA Symposium on European Rocket and Balloon Programmes and Related Research, 28 - 31 May 2001, Biarritz, France. Ed.:

Computer Science

Performance

Spectrometers: Balloon-Borne

Scientific paper

The light balloon-borne spectrometer SALOMON performs night-time observations of O3, NO2, NO3, OClO and aerosols using the Moon as light source. Four flights have occurred since the first one on October 1998 and have allowed to obtain vertical profiles of the species at mid and high latitude. Since the first flight, the performances concerning the pointing system, the spectral domain (340-700 nm) and the transmission of the instrument have been significantly improved. In particular, the increase of the optical system transmission has allowed to perform measurements during low flux Moon phases and to obtain a better retrieval of OClO contribution. The sensitivity of SALOMON allows to measure species absorption lines corresponding to mixing ratios of a few pptv. It appears that this sensitivity is better than the accuracy of the absorption cross-sections of the species measured in laboratories. Therefore, new laboratory measurements of these cross-sections especially at low temperatures are necessary.

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