BackForwardInstrument:  GOME-2 

Instrument details
Acronym GOME-2
Full name Global Ozone Monitoring Experiment - 2
Purpose Ozone profile and total-column or gross profile of other species.  Tracked species: BrO, CHOCHO, H2O, HCHO, NO2, O2, O3, O4, OClO, SO2 and aerosol
Short description
  • UV/VIS/NIR grating spectrometer, four bands, 4096 channels, with 200 polarisation channels [see detailed characteristics below]
  • Monitoring and calibration information here
Background

Evolution of GOME flown on ERS-2
Scanning Technique

Cross-track: 24 steps of 40 km or 80 km ssp, swath 960 or 1920 km - Along-track: one 40-km line every 6 s
Resolution Main channels: 40 x 40 km2 associated to 960 km swath or 40 x 80 km2 associated to 1920 km swath. Polarisation channels: respectively 40 x 5 km2 or 40 x 10 km2 .
Coverage / Cycle Global coverage every 3 days with high resolution or 1.5 days with low resolution.  Daylight only
Mass 73 kg Power 42 W Data Rate 400 kbps

 

Providing Agency ESA
Instrument Maturity Flown on operational programme
Utilization Period: 2007 to 2027
Last update: 2024-09-23
Detailed characteristics
Spectral range Number of channels Spectral resolution SNR @ specified albedo
240-315 nm 1024 0.24 - 0.29 nm 7-177 @ 50 % albedo and 60° Solar Zenith Angle
311-403 nm 1024 0.26 - 0.28 nm 372-3000 @ 50 % albedo and 60° SZA
401-600 nm 1024 0.44 - 0.53 nm 4000 @ 50 % albedo and 60° SZA
590-790 nm 1024 0.44 - 0.53 nm 2000-4000 @ 50 % albedo and 60° SZA
312-790 nm 200 2.8 nm at 312 nm to 40 nm at 790 nm 100 for λ< 400 nm, 1000 for 400 nm < λ < 790 nm
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Earth observation instrument
  • Passive optical radiometer or spectrometer
  • Cross-nadir shortwave (UV/VIS) sounder
WIGOS Subcomponents
  • Subcomponent 1
  • UV/VIS/NIR sounders, nadir and limb
  • UV/VIS/NIR nadir sounder
  • Subcomponent 3
  • NIR spectrometer
  • NIR spectrometer
Mission objectives
Primary mission objectives
  • BrO
  • CH3Br
  • ClO
  • H2O
  • HCHO
  • HCHO Total Column
  • NO
  • NO2
  • NO2 Total Column
  • O3
  • O3 Total Column
  • SO2
  • SO2 Total Column
Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Aerosol column burden2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol), VIS and NIR spectrometry including the 760 nm band for high-level aerosol
Aerosol effective radius2 - very highCloud sensitive.. Daylight only.UV, VIS and NIR spectrometry including the 760 nm band for high-level aerosol
Aerosol mass mixing ratio2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol),, VIS and NIR spectrometry including the 760 nm band for high-level aerosol
Aerosol Optical Depth2 - very highCloud sensitive.. Daylight only.UV, VIS and NIR spectrometry including the 760 nm band for high-level aerosol
Aerosol type2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol), VIS and NIR spectrometry including the 760 nm band for high-level aerosol
BrO*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. BrO lines around 300 nm
HCHO*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. HCHO lines around 350 nm
HCHO Total Column*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. HCHO lines around 350 nm
CH3Br*3 - highCloud sensitive.. Daylight only.Spectrometry in the HC3Br band from 200 to 250 nm
ClO*1 - primaryCloud sensitive.. Daylight only.UV Spectrometry. ClO lines around 300 nm
Cloud cover4 - fairDaylight only.VIS and NIR spectroscopy
Cloud drop effective radius4 - fairAt cloud top.. Daylight only.VIS and NIR spectrometry
Cloud ice effective radius4 - fairAt cloud top.. Daylight only.VIS and NIR spectrometry
Cloud optical depth4 - fairLow-density cloud only.. Daylight only.VIS and NIR spectrometry
Cloud top height4 - fairDaylight only.NIR spectrometry to estimate the total-column O2 above the cloud top as measured around 760 nm
Downward short-wave irradiance at Earth surface4 - fairCloud sensitive.. Highly indirect.. Daylight only.VIS and NIR spectrometry
Earth surface albedo4 - fairCloud sensitive.VIS spectrometry, range fully covered
Fraction of Absorbed PAR (FAPAR)2 - very highCloud sensitive.VIS spectrometry including Red at 700 nm
H2O*3 - highCloud sensitive.. Daylight only.Spectrometry in UV and VIS (several weak bands), and NIR (strong band around 940 nm)
NO*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. NO lines around 250 nm
NO2*1 - primaryCloud sensitive.. Daylight only.UV and VIS spectrometry. Several lines in the ranges around 220 nm and 400 nm
NO2 Total Column*1 - primaryCloud sensitive.. Daylight only.UV and VIS spectrometry. Several NO2 lines
O3*2 - very highCloud sensitive.. Daylight only.UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis)
O3 Total Column*2 - very highCloud sensitive.. Daylight only.UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis)
Photosynthetically Active Radiation (PAR)2 - very highCloud sensitive.VIS spectrometry, range fully covered
PSC occurrence2 - very highCoarse vertical resolution.. Daylight only.UV and VIS spectrometry
Short-wave cloud reflectance5 - marginalNo specific limitation.VIS and NIR spectrometry. Unsuitable dynamic range (saturation)
SO2*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. SO2 lines around 350 nm
SO2 Total Column*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. SO2 lines around 350 nm
Upward short-wave irradiance at TOA3 - highSpectral interpolation needed.. Information on BRDF needed.UV, VIS and NIR spectrometry
Upward spectral radiance at TOA5 - marginalMissing SWIR and all Long-waves.UV, VIS and NIR spectrometry
Aerosol volcanic ash2 - very highCloud sensitive.. Daylight only.UV (specifically sensitive to ash), VIS and NIR spectrometry including the 760 nm band for high-level ash
Aerosol volcanic ash Total Column2 - very highCloud sensitive.. Daylight only.UV (specifically sensitive to ash), VIS and NIR spectrometry including the 760 nm band for high-level ash