BackForwardInstrument:  AMSR-E 

Instrument details
Acronym AMSR-E
Full name Advanced Microwave Scanning Radiometer for EOS
Purpose Multi-purpose MW imager
Short description Large antenna, 6 frequencies / 12 channels in the range 6.9 to 89 GHz, window channels only [see detailed characteristics below]
Background Follow-on of AMSR flown on ADEOS-2
Scanning Technique Conical: 55° zenith angle; swath: 1450 km - Scan rate: 40 scan/min = 10 km/scan
Resolution Changing with frequency, consistent with an antenna diameter of 1.6 m
Coverage / Cycle Global coverage once/day
Mass 314 kg Power 350 W Data Rate 87.4 kbps

 

Providing Agency JAXA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2002-09-01 to 2011-10-04
Last update: 2012-09-05
Detailed characteristics
Central frequency (GHz) Bandwidth (MHz) Polarisations NEΔT IFOV Pixel
6.925 350 V, H 0.3 K 43x75 km 10x10 km
10.65 100 V, H 0.6 K 29x51 km 10x10 km
18.7 200 V, H 0.6 K 16x27 km 10x10 km
23.8 400 V, H 0.6 K 14x21 km 10x10 km
36.5 1000 V, H 0.6 K 9x14 km 10x10 km
89.0 3000 V, H 1.1 K 4x6 km 5x5 km
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 microwave radiometer
  • Conical scanning microwave radiometer
Mission objectives
Primary mission objectives
  • Precipitation intensity at surface (liquid or solid)
  • Sea surface temperature
  • Sea-ice cover
  • Wind speed over the surface (horizontal)
Secondary mission objectives
  • Biomass
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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
Accumulated precipitation (over 24 h)3 - highPoor time sampling.. Time sampling to be interpolated by GEO.MW channels around 10, 19, 23, 37 and 90 GHz, with high spatial resolution
Biomass4 - fairIndex only.. Coarse spatial resolution.Derived from differential effect of vegetation across MW frequencies around 7, 10 and 19 GHz
Cloud liquid water (CLW)4 - fairNo specific limitation.MW channels around 37 and 90 GHz
Cloud liquid water (CLW) total column3 - highNo specific limitation.MW channels around 37 and 90 GHz
Land surface temperature4 - fairCoarse spatial resolution.MW channels around 7 and 10 GHz
Long-wave Earth surface emissivity3 - highLong time series needed.MW channels around 7, 10, 19, 37 and 90 GHz. Emissivity across this MW range inferred by statistical analysis
Precipitation intensity at surface (liquid or solid)2 - very highNo specific limitation.MW channels around 10, 19, 23, 37 and 90 GHz, to cover sea and land, heavy and light precipitation. High spatial resolution consistent with the scale of precipitation
Sea surface temperature3 - highNo specific limitation.MW channels around 7 and 10 GHz
Sea-ice cover1 - primaryNo specific limitation.MW channels around 7, 10, 19, 37 and 90 GHz, with high spatial resolution for accurate contour detection
Sea-ice type4 - fairNo specific limitation.MW channels around 10, 19, 37 and 90 GHz. Type interpreted as age/roughness
Snow cover2 - very highCoarse spatial resolution.MW channels around 19, 37 and 90 GHz. Higher frequencies less sensitive to emissivity from ground under snow . High resolution closer to the scale of snow fields
Snow status (wet/dry)2 - very highCoarse spatial resolution.MW channels around 19, 37 and 90 GHz. Higher frequencies less sensitive to emissivity from ground under snow. High resolution closer to the scale of snow fields
Snow water equivalent3 - highCoarse spatial resolution.. Ground stations network needed.MW channels around 19, 37 and 90 GHz. Higher frequencies less sensitive to emissivity from ground under snow. High resolution closer to the scale of snow fields
Soil moisture (in the roots region)4 - fairCoarse spatial resolution.. Affected by vegetation.MW channels around 7 GHz. Assimilation process required
Soil moisture at surface3 - highCoarse spatial resolution.. Affected by vegetation.MW channels around 7 and 10 GHz
Integrated Water Vapour (IWV)1 - primaryNo specific limitation.Use of water vapour band around 23 GHz with dual polarisation. High resolution useful for tomography
Wind speed over the surface (horizontal)2 - very highOver sea only.MW channels around 7, 10, 19 and 37 GHz