BackForwardInstrument:  SW spectrometer 

Instrument details
Acronym SW spectrometer
Full name Short-wave Spectrometer
Purpose Benchmark data for climate monitoring: extended spectrum towards Space
Short description Range 0.32-2.3 μm, spectral resolution 4 nm. radiometric accuracy 0.3 %
Background New development
Scanning Technique Nadir only.
Resolution 100 km
Coverage / Cycle Global coverage in 1 month for 100 km average spacing
Mass Power Data Rate

 

Providing Agency NASA
Instrument Maturity Backed by strong heritage
Utilization Period: TBD
Last update: 2014-09-24
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
Mission objectives
Primary mission objectives
  • Earth surface albedo
  • Integrated Water Vapour (IWV)
  • Upward short-wave irradiance at TOA
  • Upward spectral radiance at TOA
Secondary mission objectives
  • Aerosol Optical Depth
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Tentative 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
VariableRelevance for measuring this variableOperational limitationsExplanation
Aerosol column burden3 - highCloud sensitive.. Daylight only.. Along-track only.UV (for absorbing aerosol), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level aerosol
Aerosol effective radius5 - marginalCloud sensitive.. Daylight only.. Along-track only.UV, VIS, NIR including the 760 nm band for high-level aerosol, and SWIR spectrometry
Aerosol mass mixing ratio4 - fairCloud sensitive.. Daylight only.. Along-track only.UV (for absorbing aerosol), VIS, NIR (including the 760 nm band for high-level aerosol) and SWIR spectrometry
Aerosol Optical Depth3 - highCloud sensitive.. Daylight only.. Along-track only.UV, VIS, NIR and SWIR spectrometry including the 760 nm band for high-level aerosol
Aerosol type4 - fairCloud sensitive.. Daylight only.. Along-track only.UV (for absorbing aerosol), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level aerosol
Cloud cover4 - fairDaylight only.. Along-track only.VIS, NIR and SWIR spectroscopy
Cloud drop effective radius4 - fairAt cloud top.. Daylight only.. Along-track only.VIS, NIR and SWIR spectrometry
Cloud ice effective radius4 - fairAt cloud top.. Daylight only.. Along-track only.VIS, NIR and SWIR spectrometry
Cloud optical depth3 - highLow-density cloud only.. Daylight only.. Along-track only.VIS, NIR and SWIR spectrometry
Earth surface albedo4 - fairCloud sensitive.. Along-track only.VIS spectrometry, range fully covered
Fraction of Absorbed PAR (FAPAR)3 - highCloud sensitive.. Along-track only.VIS spectrometry including Red at 700 nm
O3 (Total column)4 - fairCloud sensitive.. Daylight only.. Along-track 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)3 - highCloud sensitive.. Along-track only.VIS spectrometry, range fully covered
Integrated Water Vapour (IWV)4 - fairCloud sensitive.. Daylight only.. Along-track only.NIR spectrometry covering the 940 nm band
Upward short-wave irradiance at TOA3 - highInformation on BRDF needed.. Along-track only.UV, VIS, NIR and SWIR spectrometry
Upward spectral radiance at TOA3 - highMissing all Long-waves.. Along-track only.UV, VIS, NIR and SWIR spectrometry
Aerosol volcanic ash3 - highCloud sensitive.. Daylight only.. Along-track only.UV (specifically sensitive to ash), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level ashl
Aerosol volcanic ash (Total column)3 - highCloud sensitive.. Daylight only.. Along-track only.UV (specifically sensitive to ash), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level ashl