Global Ozone Monitoring by Occultation of Stars (GOMOS), is an instrument on board the European satellite Envisat launched 1 March 2002. It is the first space instrument dedicated to the study of the atmosphere of the Earth by the technique of stellar occultation. The spectrum of stars in the ultraviolet, visible and the near infrared parts of the electromagnetic spectrum is observed.
FMI L3 GOMOS products: The products provided are based on ESA L2 GOMOS processing (software version IPF 5.0). L2 processing retrieves O3, NO2, NO3, and aerosol extinction profiles using spectral inversion based on absolute cross sections and vertical inversion based on onion peeling and Tikhonov smoothing (see links below for more information) . Level 3 climatologies are collected using 10 deg. altitude grid, 1 km vertical grid and using median values (for details, see Kyrölä et al., Nighttime ozone profiles in the stratosphere and mesosphere by GOMOS on Envisat J. Geophys. Res., 111, D24306, 2006).
More info on Envisat and GOMOS:
OSIRIS is an optical spectrograph and infrared imager system that is flying on the Odin satellite.
OSIRIS(Optical Spectrograph and Infrared Imager System) is one of the two instru-
ments on board the Odin satellite, launched in February 2001. Odin is a Swedish-led satellite project funded jointly by Sweden (SNSB), Canada (CSA), France (CNES), and Finland (TEKES). OSIRIS measures limb-scattered solar light (radiance) in the wavelength region of 280-800 nm with around 1 nm spectral resolution. Odin scans towards the Earth's limb from 7 to 110 km through a controlled nodding motion. The vertical sampling resolution is 1-3 km. OSIRIS is the first dedicated satellite instrument to measure continuously the vertical composition of the atmosphere using the limb scatter technique and by recording the full spectrum from UV to visible wavelengths with a good spectral resolution.
More info on Odin and OSIRIS:
GOMOS ASCII data: Columns: 1 month; 2 center of latitude bin; 3:93 values for altitudes 10-100 km
GOMOS mat data includes the variables: years,gas (=name), lataxis (latitude bin centers), sunzenr (=solar zenith range), altgrid (=altitudes), medabs3 or medmix3: 111 x 18 x 12 array for data. Note: altitude range larger than in ASCII data.
OSIRIS ASCII data: Columns: 1 month; 2 center of latitude bin; 3:63 values for altitudes 10-70 km
OSIRIS mat data includes the variables: years,gas (=name), lataxis (latitude bin centers), sunzenr (=solar zenith range), altgrid (=altitudes), medabs3 or medmix3: 61 x 18 x 12 array for data.
In ASCII files missing data=-999. In mat-files missing data =NaN.