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
GOMOS Level 2 products (GOM_NL_2P - IPF v6.01) are now also available as user friendly products (UFP) in NetCDF4 format.
In addition users are informed that the full mission Envisat GOMOS Level 1 and 2 data sets (from 15/04/2002 to 08/04/2012), reprocessed with the ESA processor IPF version 6.01, have been migrated to the ESA EO centralised online dissemination service.
Related Data Types
Related (Key) Documentation