BackForwardInstrument:  TOU 

Instrument details
Acronym TOU
Full name Total Ozone Unit
Purpose Ozone total column mapping
Short description
  • 6 channels of 1.2 nm bandwidth in the range 308-360 nm
  • Calibration monitoring here
Background

New development
Scanning Technique

Cross-track scanning, swath 3000 km
Resolution 50 km
Coverage / Cycle Global coverage once/day.  Daylight
Mass 19.2 kg Power 18 W Data Rate 1 kbps

 

Providing Agency CMA
Instrument Maturity Flown on operational programme
Utilization Period: 2008 to 2024
Last update: 2024-09-09
Detailed characteristics
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
Mission objectives
Primary mission objectives
  • O3 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 spectrometry for absorbing aerosol
Aerosol effective radius2 - very highCloud sensitive.. Daylight only.UV spectrometry for absorbing aerosol
Aerosol mass mixing ratio2 - very highCloud sensitive.. Daylight only.UV spectrometry for absorbing aerosol
Aerosol Optical Depth2 - very highCloud sensitive.. Daylight only.UV spectrometry for absorbing aerosol
Aerosol type2 - very highCloud sensitive.. Daylight only.UV spectrometry for absorbing aerosol
HCHO Total Column3 - highCloud sensitive.. Daylight only.UV spectrometry. HCHO lines around 350 nm
NO2 Total Column3 - highCloud sensitive.. Daylight only.UV spectrometry. Several NO2 lines
O3 Total Column*3 - highCloud sensitive.. Daylight only.UV spectroradiometer. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins)
PSC occurrence3 - highCoarse vertical resolution.. Daylight only.UV spectrometry
SO2 Total Column5 - marginalCloud sensitive.. Daylight only.UV spectrometry. SO2 lines around 350 nm
Aerosol volcanic ash2 - very highCloud sensitive.. Daylight only.UV spectrometry, specifically sensitive to ash
Aerosol volcanic ash Total Column2 - very highCloud sensitive.. Daylight only.UV spectrometry, specifically sensitive to ash