GOMOS is a medium resolution spectrometer covering the wavelength range from 250 nm to 950 nm. The high sensitivity requirement down to 250 nm has been a significant design driver leading to an all-reflective optical system design for the UVVIS part of the spectrum and to functional pupil separation between the UVVIS and the NIR spectral regions (thus no dichroic separation of UV). Due to the requirement of operating on very faint stars (down to magnitude 4 to 5), the sensitivity requirement to the instrument is very high. Consequently, a large telescope (30 cm × 20 cm aperture) had to be used to collect sufficient signal, and detectors with high quantum efficiency and very low noise had to be developed to achieve the required signal to noise ratios.
Relative spectral accuracy: 0.17 / 0.20 nm in UVVIS (dark / brightlimb typical)
Spectrometers: UV-Vis: 248-371nm & 387-693nm,NIR:750-776nm& 915-956nm,Photometers: 644-705nm & 466-528nm
Atmosphere ( Chemistry , Ozone )
Latest Mission Operations News
13 February 2015
The systematic bulk processing of the MERIS Level 2 Full Resolution Full Swath dataset has been completed, and the FRS Level 2 products (MER_FRS_2P) have been made available to users on the ESA centralised dissemination server together with the previously released MERIS FRS Level 1 data (MER_FRS_1P).
The MERIS FRS online dataset now comprises the complete FRS Level 1 and Level 2 data archive for the entire Envisat mission spanning from 17 May 2002 to 08 April 2012.
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