BackForwardInstrument:  OPS (ASNARO) 

Instrument details
Acronym OPS (ASNARO)
Full name Optical sensor
Purpose Very-high-resolution land imagery
Short description 7-channel VIS/NIR radiometer with one panchromatic channel, and 6 multi-spectral (3 VIs, 3 NIR)
Background New development
Scanning Technique Pushbroom, swath 10 km addressable by tilting the satellite in a variety of operating modes within a Field-of-Regard of 900 km. Stereo capability both in-orbit and cross-orbits
Resolution 0.5 m (panchromatic), 2 m (multi-spectral)
Coverage / Cycle Global coverage in 6 months, in daylight; in few days (down to 3) by strategicv pointing
Mass 97 kg Power 140 W Data Rate 800 Mbps

 

Providing Agency NEC
Instrument Maturity Backed by strong heritage
Utilization Period: 2014-12-06 to ≥2022
Last update: 2017-03-28
Detailed characteristics
Central wavelength Spectral interval SNR @ specified albedo
N/A (PAN) ….. - …. μm ……….. @ ……… % albedo
…. μm ….. - …. μm ……….. @ ……… % albedo
…. μm ….. - …. μm ……….. @ ……… % albedo
…. μm ….. - …. μm ……….. @ ……… % albedo
…. μm ….. - …. μm ……….. @ ……… % albedo
…. μm ….. - …. μm ……….. @ ……… % albedo
…. μm ….. - …. 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
  • High resolution optical imager
Mission objectives
Primary mission objectives
  • Biomass
  • Fraction of Absorbed PAR (FAPAR)
  • Fraction of vegetated land
  • Land cover
  • Leaf Area Index (LAI)
Show allShow fewer
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
Biomass5 - marginalCloud sensitive.. Index only.. Infrequent coverage.. Daylight only.VIS and NIR channels. Biomass inferred from NDVI
Cloud cover5 - marginalInfrequent coverage.. Daylight only.VIS and NIR channels
Cloud optical depth5 - marginalLow-density cloud only.. Infrequent coverage.. Daylight only.VIS and NIR channels
Earth surface albedo4 - fairCloud sensitive.. Infrequent coverage.VIS channels
Fire fractional cover1 - primaryCloud sensitive.. Infrequent coverage.. Daylight only.Panchromatic channel with high resolution, for fire boundary detection
Fraction of Absorbed PAR (FAPAR)3 - highCloud sensitive.. Infrequent coverage.VIS channels including Red at 700 nm
Fraction of vegetated land2 - very highCloud sensitive.. Daylight only.VIS and NIR channels
Glacier cover3 - highCloud sensitive.. Long time for mapping.. Daylight only.VIS and NIR channels; and panchromatic channel with high resolution, for glacier boundary detection
Glacier topography3 - highCloud sensitive.. Long time for mapping.. Daylight only.VIS and panchromatic channels with cross- and along-track steering capability for stereoscopy both in-orbit and between orbits
Ice sheet topography3 - highCloud sensitive.. Long time for mapping.. Daylight only.VIS and panchromatic channels with cross- and along-track steering capability for stereoscopy both in-orbit and between orbits
Land cover3 - highCloud sensitive.. Daylight only.VIS and NIR channels
Land surface topography3 - highCloud sensitive.. Long time for mapping.. Daylight only.VIS and panchromatic channels with cross- and along-track steering capability for stereoscopy both in-orbit and between orbits
Leaf Area Index (LAI)5 - marginalCloud sensitive.. Daylight only.. Infrequent coverage.VIS and NIR channels. LAI inferred from NDVI
Normalised Difference Vegetation Index (NDVI)2 - very highCloud sensitive.. Infrequent coverage.VIS and NIR channels
Photosynthetically Active Radiation (PAR)4 - fairCloud sensitive.. Infrequent coverage.VIS channels, range undersampled
Sea-ice cover5 - marginalCloud sensitive.. Daylight only.VIS and NIR (for contour enhancement) channels
Short-wave cloud reflectance5 - marginalInfrequent coverage.VIS and NIR channels. Unsuitable dynamic range (saturation)
Snow cover3 - highCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR and panchromatic (higher resolution) channels
Soil moisture at surface5 - marginalCloud sensitive.. Index only.. Infrequent coverage.. Daylight only.VIS and NIR channels. Soil moisture inferred from differential brightness
Soil type5 - marginalCloud sensitive.. Daylight only.VIS and NIR channels
Upward short-wave irradiance at TOA5 - marginalSpectral interpolation needed.. Information on BRDF needed.. Infrequent coverage.VIS and NIR channels
Vegetation type4 - fairCloud sensitive.. Daylight only.VIS and NIR channels
Aerosol volcanic ash5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS and NIR channels
Aerosol volcanic ash (Total column)5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS and NIR channels