BackForwardInstrument:  OIS 

Instrument details
Acronym OIS
Full name Optical Imaging System
Purpose High-resolution land observation, disasters monitoring
Short description 4-channel radiometer including 3 for RGB and 1 panchromatic (PAN) [see detailed characteristics below]
Background Consolidated technology
Scanning Technique Pushbroom. Swath: 30 km possible to be pointed within a field of regard of 800 km
Resolution IFOV: PAN: 7.5 m; RGB: 15 m
Coverage / Cycle Global coverage in 3 months; frequent observation of selected areas by strategic pointing
Mass 6.5 kg Power 22 W Data Rate

 

Providing Agency TÜBITAK-UZAY
Instrument Maturity Backed by strong heritage
Utilization Period: 2012-01-01 to ≥2020
Last update: 2017-03-28
Detailed characteristics
Central wavelength Spectral interval SNR @ specified albedo
485 nm 420 - 550 nm …….. @ ……. % albedo
590 nm 550 - 630 nm …….. @ ……. % albedo
655 nm 580 - 730 nm …….. @ ……. % albedo
N/A  (PAN) 420 - 730 nm …….. @ ……. % 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
  • Fraction of Absorbed PAR (FAPAR)
Secondary mission objectives
  • Fire fractional cover
  • Photosynthetically Active Radiation (PAR)
  • Sea-ice cover
Opportunity objectives
  • 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
Cloud cover5 - marginalInfrequent coverage.. Daylight only.VIS channel(s)
Earth surface albedo5 - marginalCloud sensitive.. Infrequent coverage.VIS channels
Fire fractional cover2 - very highCloud sensitive.. Daylight only.VIS channels with high resolution for boundary detection
Fraction of Absorbed PAR (FAPAR)4 - fairCloud sensitive.. Infrequent coverage.VIS channels including Red at 700 nm
Glacier cover5 - marginalCloud sensitive.. Long time for mapping.. Daylight only.VIS and panchromatic channel with higher resolution, for glacier boundary detection
Glacier topography5 - marginalCloud sensitive.. Long time for mapping.. Daylight only.VIS and panchromatic channels with cross-track steering capability for stereoscopy between images from neighbour orbits
Ice sheet topography5 - marginalCloud sensitive.. Long time for mapping.. Daylight only.VIS and panchromatic channels with cross-track steering capability for stereoscopy between images from neighbouring orbits
Land surface topography5 - marginalCloud sensitive.. Long time for mapping.. Daylight only.VIS and panchromatic channels with cross-track steering capability for stereoscopy between images from neighbour orbits
Photosynthetically Active Radiation (PAR)4 - fairCloud sensitive.. Infrequent coverage.VIS channels, range undersampled
Sea-ice cover5 - marginalCloud sensitive.. Daylight only.VIS channel(s)
Snow cover5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS and panchromatic (higher resolution) channels