BackForwardInstrument:  ETM+ 

Instrument details
Acronym ETM+
Full name Enhanced Thematic Mapper +
Purpose Land and vegetation observation
Short description 8 channels (6 narrow-band in VIS/NIR/SWIR, one PAN,  one in TIR) [see detailed characteristics below]
Background Evolution of ETM flown on Landsat-6
Scanning Technique Wiskbroom; 6000 pixel/line (narrow-band), 12000 pixel/line (PAN), 3000 pixel/line (TIR); swath 185 km
Resolution 30 m (6 narrow-band channels), 15 m (PAN), 60 m (TIR)
Coverage / Cycle Global coverage in 16 days, in daylight.
Mass 441 kg Power 590 W Data Rate 150 Mbps

 

Providing Agency NASA
Instrument Maturity Flown on operational programme
Utilization Period: 1999 to 2024
Last update: 2021-06-16
Detailed characteristics
Central Spectral SNR or NEΔT @ specified input
wavelength interval Low signal High signal
Panchromatic 0.50 - 0.90 µm 14 @ 22.9 W m-2 sr-1 μm-1 80 @ 156.3 W m-2 sr-1 μm-1
0.48 µm 0.45 - 0.52 µm 36 @ 40 W m-2 sr-1 μm-1 130 @ 190 W m-2 sr-1 μm-1
0.56 µm 0.53 - 0.61 µm 37 @ 30 W m-2 sr-1 μm-1 167 @ 193.7 W m-2 sr-1 μm-1
0.66 µm 0.63 - 0.69 µm 24 @ 21.7 W m-2 sr-1 μm-1 127  @ 149.6 W m-2 sr-1 μm-1
0.83 µm 0.78 - 0.90 µm 33 @ 13.6 W m-2 sr-1 μm-1 226 @ 149.6 W m-2 sr-1 μm-1
1.65 µm 1.55 - 1.75 µm 34 @ 4.0 W m-2 sr-1 μm-1 176 @ 31.5 W m-2 sr-1 μm-1
2.20 µm 2.09 - 2.35 µm 27 @ 1.7 W m-2 sr-1 μm-1 130 @ 11.1 W m-2 sr-1 μm-1
11.45 µm 10.4 - 12.5 µm 0.2 K @ 300 K 0.2 K @ 320K
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 1
  • High-resolution multi-spectral VIS/IR imagers
  • High-resolution multi-spectral VIS/IR imager
Mission objectives
Primary mission objectives
  • Biomass
  • Fire fractional cover
  • 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