BackForwardInstrument:  LISS-3 (IRS-1) 

Instrument details
Acronym LISS-3 (IRS-1)
Full name Linear Imaging Self-Scanning Sensor - 3
Purpose High-resolution land and vegetation observation
Short description Two parallel radiometers, 4 VIS/NIR/SWIR channels [see detailed characteristics below]
Background Follow-on of LISS-2 flown on IRS-1 A/B
Scanning Technique Pushbroom, 6000 detectors array (VIS/NIR channels), 2100 detectors array (SWIR channel); swath (with two instruments): 142 km (VIS/NIR channels) and 148 km (SWIR channel)
Resolution 23.5 m (VIS/NIR channels, 70.5 m (SWIR channel)
Coverage / Cycle Global coverage in 24 days, in daylight
Mass 171 kg Power 78 W Data Rate 37.2 Mbps

 

Providing Agency ISRO
Instrument Maturity Flown on operational programme
Utilization Period: 1996 to 2010-01-15
Last update: 2017-03-28
Detailed characteristics
Central wavelength Spectral interval SNR @ specified input spectral radiance
0.555 µm 0.52 - 0.59 µm 200 @ 278 W m-2 sr-1 µm-1
0.650 µm 0.62 - 0.68 µm 200 @ 284 W m-2 sr-1 µm-1
0.815 µm 0.77 - 0.86 µm 200 @ 320 W m-2 sr-1 µm-1
1.625 µm 1.55 - 1.75 µm ... @ .... W m-2 sr-1 µm-1
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 vegetated land
  • Land cover
  • Leaf Area Index (LAI)
  • Normalised Difference Vegetation Index (NDVI)
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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.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels. Biomass inferred from NDVI and LAI
Cloud cover5 - marginalInfrequent coverage.. Daylight only.VIS, NIR and SWIR channels
Cloud optical depth4 - fairLow-density cloud only.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels
Fraction of vegetated land2 - very highCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
Glacier cover2 - very highCloud sensitive.. Long time for mapping.. Daylight only.VIS, NIR and SWIR channels, screening ice from clouds
Land cover3 - highCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
Leaf Area Index (LAI)2 - very highCloud sensitive.. Daylight only.. Infrequent coverage.VIS, NIR and SWIR channels
Normalised Difference Vegetation Index (NDVI)2 - very highCloud sensitive.. Infrequent coverage.VIS and NIR channels
Photosynthetically Active Radiation (PAR)5 - marginalCloud sensitive.. Infrequent coverage.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 reflectance5 - marginalInfrequent coverage.VIS, NIR and SWIR channels. Unsuitable dynamic range (saturation)
Snow cover2 - very highCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels, enabling screening snow from clouds
Soil moisture at surface5 - marginalCloud sensitive.. Index only.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels. Soil moisture inferred from differential brightness
Soil type4 - fairCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
Upward short-wave irradiance at TOA5 - marginalSpectral interpolation needed.. Information on BRDF needed.. Infrequent coverage.VIS, NIR and SWIR channels
Vegetation type3 - highCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
Aerosol volcanic ash5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels
Aerosol volcanic ash (Total column)5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels