BackForwardInstrument:  OMS-nadir 

Instrument details
Acronym OMS-nadir
Full name Ozone Monitoring Suite - nadir scanning unit
Purpose Atmospheric chemistry - Ozone profile and total-column or gross profile of other species. Tracked species: BrO, HCHO, NO2, O3, OClO, SO2 and aerosol
Short description
  • Three bands - UV1 250-300, UV2 300-320, VIS 320-500 nm. See table below for more details.
  • Calibration monitoringĀ here
Background

Replacing TOU + SBUS flown on FY-3 A/B/C
Scanning Technique

Total ozone mapper: swath 2900 km. Profiler: non-scanning
Resolution See table below for each band.
Coverage / Cycle Global coverage: mapper once/day, profiler in 40 days. Daylight only.
Mass Power Data Rate

 

Providing Agency CMA
Instrument Maturity Backed by strong heritage
Utilization Period: 2023 to 2032
Last update: 2024-09-09
Detailed characteristics
Spectral range No. of channels Spectral resolution IFOV Along x Across Track
250-300 nm 50 1 nm 21 x 28 km
300-320 nm 40 0.5 nm 7 x 7 km
320 - 500 nm 327 0.5-0.6 nm 7 x 7 km
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
  • Aerosol Optical Depth
  • Aerosol column burden
  • BrO
  • 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 burden*2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
Aerosol effective radius2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
Aerosol mass mixing ratio2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
Aerosol Optical Depth*2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
Aerosol type2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
BrO*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. BrO lines around 300 nm
HCHO*2 - very highCloud sensitive.. Coarse vertical resolution.. Daylight only.UV spectrometry. HCHO lines around 350 nm
HCHO Total Column*2 - very highCloud sensitive.. Daylight only.UV spectrometry. HCHO lines around 350 nm
ClO*1 - primaryCloud sensitive.. Daylight only.UV Spectrometry. ClO lines around 300 nm
Cloud cover5 - marginalDaylight only.VIS spectroscopy
Cloud optical depth5 - marginalLow-density cloud only.. Daylight only.VIS spectrometry
H2O*3 - highCloud sensitive.. Daylight only.UV and VIS spectrometry. Several weak bands
NO*2 - very highCloud sensitive.. Coarse vertical resolution.. Daylight only.UV spectrometry. NO lines around 250 nm
NO2*2 - very highCloud sensitive.. Coarse vertical resolution.. Daylight only.UV and VIS spectrometry. Several lines in the ranges around 220 nm and 400 nm
NO2 Total Column*2 - very highCloud 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)
PSC occurrence2 - very highCoarse vertical resolution.. Daylight only.UV and VIS spectrometry
SO2*2 - very highCloud sensitive.. Coarse vertical resolution.. Daylight only.UV spectrometry. SO2 lines around 350 nm
SO2 Total Column*3 - highCloud sensitive.. Daylight only.UV spectrometry. SO2 lines around 350 nm
Upward short-wave irradiance at TOA3 - highSpectral interpolation needed.. Information on BRDF needed.UV and VIS spectrometry
Upward spectral radiance at TOA5 - marginalMissing NIR, SWIR and all Long-waves.UV and VIS spectrometry
Aerosol volcanic ash2 - very highCloud sensitive.. Daylight only.UV (specifically sensitive to ash) and VIS spectrometry
Aerosol volcanic ash Total Column2 - very highCloud sensitive.. Daylight only.UV (specifically sensitive to ash) and VIS spectrometry