BackForwardInstrument:  Végétation-P 

Instrument details
Acronym Végétation-P
Full name Végétation for PROBA
Purpose Vegetation observation
Short description 4-channel VIS/NIR/SWIR radiometer [see detailed characteristics below]
Background Follow-on of Végétation flown on SPOT 4 and 5.
Scanning Technique Pushbroom, 6000 pixels/line (VNIR channels), 3000 pixels/line (SWIR channel), swath 2285 km.
Resolution 100 m at s.s.p. (VNIR), 200 m at s.s.p. (SWIR)
Coverage / Cycle Near-global coverage in one day
Mass 35 kg Power 43.2 W Data Rate 7.15 Mbps

 

Providing Agency CNES
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2013-12-03 to ≥2020
Last update: 2017-03-27
Detailed characteristics
Central wavelength Spectral interval SNR @ specified albedo
0.457 µm 0.415 - 0.500 µm …... @ ….. % albedo
0.675 µm 0.580 - 0.770 µm …... @ ….. % albedo
0.845 µm 0.730 - 0.960 µm …... @ ….. % albedo
1.620 µm 1.480 - 1.760 µm …... @ ….. % albedo
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
  • Moderate resolution optical imager
Mission objectives
Primary mission objectives
  • Biomass
  • Leaf Area Index (LAI)
  • Normalised Difference Vegetation Index (NDVI)
Secondary mission objectives
  • Aerosol volcanic ash Total Column
  • Cloud cover
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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
Biomass4 - fairCloud sensitive.. Index only.. Daylight only.VIS, NIR and SWIR channels. Biomass inferred from NDVI and LAI
Cloud cover5 - marginalDaylight only.VIS and NIR channels
Cloud optical depth3 - highLow-density cloud only.. Daylight only.VIS, NIR and SWIR channels
Cloud type5 - marginalDaylight only.VIS and NIR channels
Downward short-wave irradiance at Earth surface3 - highCloud sensitive.. Highly indirect.VIS, NIR and SWIR channels
Fire fractional cover5 - marginalCloud sensitive.. Coarse spatial resolution.. Daylight only.VIS channels
Leaf Area Index (LAI)2 - very highCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
Normalised Difference Vegetation Index (NDVI)3 - highCloud sensitive.VIS and NIR channels
Photosynthetically Active Radiation (PAR)5 - marginalCloud sensitive.VIS channels, range undersampled
Sea-ice cover4 - fairCloud sensitive.. Daylight only.VIS, NIR (for contour enhancement) and SWIR (for discrimination from clouds) channels
Short-wave cloud reflectance4 - fairNo specific limitation.VIS, NIR and SWIR channels
Snow cover2 - very highCloud sensitive.. Daylight only.VIS, NIR and SWIR channels, enabling screening snow from clouds
Soil moisture at surface5 - marginalCloud sensitive.. Index only.. Daylight only.VIS, NIR and SWIR channels. Soil moisture inferred from differential brightness
Upward short-wave irradiance at TOA5 - marginalSpectral interpolation needed.. Information on BRDF needed.VIS, NIR and SWIR channels
Aerosol volcanic ash5 - marginalCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
Aerosol volcanic ash Total Column5 - marginalCloud sensitive.. Daylight only.VIS, NIR and SWIR channels