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
05 January 2018
Due to a scheduled maintenance starting on 09 January 2018, access to the On-The-Fly online dissemination systems will be unavailable and the access to the ERS and Envisat (A)SAR collections via EOLI-SA will also be affected during the maintenance on 10 January 2018.
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