BackForwardInstrument:  DMAC 

Instrument details
Acronym DMAC
Full name DubaiSat-1 Medium Aperture Camera
Purpose High-resolution land observation, disaster monitoring
Short description 5-channel VNIR radiometer including one panchromatic [see detailed characteristics below]
Background Consolidated technology
Scanning Technique Pushbroom. Swath 20 km, addressable within a field or regard of 720 km
Resolution PAN: 2.5 m, multispectral 5 m
Coverage / Cycle Global coverage in 4 months. Minimum revisit time for a specific area: 4 days
Mass 38.7 kg Power 52.3 W Data Rate 30 Mbps

 

Providing Agency EIAST
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2010 to 2016
Last update: 2022-08-08
Detailed characteristics
Central wavelength Spectral interval SNR @ specified albedo
465 nm 420 - 510 nm ……… @ …… % albedo 
545 nm 510 - 580 nm ……… @ …… % albedo 
660 nm 600 - 720 nm ……… @ …… % albedo 
825 nm 760 - 890 nm ……… @ …… % albedo 
665 (PAN) 420 - 890 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
WIGOS Subcomponents
  • Subcomponent 4
  • High-resolution optical observation constellation (commercial)
  • High-resolution optical observation constellation (commercial)
Mission objectives
Primary mission objectives
  • Biomass
  • Fraction of Absorbed PAR (FAPAR)
  • Fraction of vegetated land
  • Land cover
  • Leaf Area Index (LAI)
  • Normalised Difference Vegetation Index (NDVI)
  • Vegetation type
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
Biomass*5 - 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 depth4 - fairLow-density cloud only.. Infrequent coverage.. Daylight only.VIS and NIR channels
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
Fraction of vegetated land*2 - very highCloud sensitive.. Daylight only.VIS and NIR channels
Glacier cover4 - fairCloud sensitive.. Long time for mapping.. Daylight only.VIS and NIR channels; and panchromatic channel with high 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 cover*2 - very highCloud sensitive.. Daylight only.VIS and NIR channels
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
Leaf Area Index (LAI)*4 - fairCloud 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
Short-wave cloud reflectance5 - marginalInfrequent coverage.VIS and NIR channels. Unsuitable dynamic range (saturation)
Snow cover4 - fairCloud 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 type2 - very highCloud 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 type*3 - highCloud sensitive.. Daylight only.VIS and NIR channels
Aerosol volcanic ash5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS and NIR channels
Aerosol volcanic ash Total Column5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS and NIR channels
Sea-ice cover5 - marginalCloud sensitive.. Daylight only.VIS and NIR (for contour enhancement) channels