BackForwardInstrument:  CPR (Earth-CARE) 

Instrument details
Acronym CPR (Earth-CARE)
Full name Cloud Profiling Radar for Earth-CARE
Purpose Vertical profile of cloud water (liquid and ice), vertical velocity
Short description Frequency 94.05 GHz, Doppler capability, Sensitivity: - 35 dBZ
Background New development
Scanning Technique None.  Along-track sampling at 1 km intervals
Resolution Horizontal: 0.65 km (cross-track) x 1 km (along-track); vertical 400 m
Coverage / Cycle Global coverage in 16 days for cells of 100 km side
Mass 230 kg Power 308 W Data Rate 822 kbps

 

Providing Agency JAXA
Instrument Maturity Backed by strong heritage
Utilization Period: ≥2021 to ≥2024
Last update: 2012-05-07
Detailed characteristics
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
  • Active and radio-occultation sensor
  • Cloud and precipitation radar
Mission objectives
Primary mission objectives
  • Cloud base height
  • Cloud drop effective radius
  • Cloud ice
  • Cloud ice Total Column
  • Cloud ice effective radius
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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)5 - marginalLight precipitation only.. Along-track only.. Time sampling to be interpolated by GEO.W-band radar (around 94 GHz). Sensitive to very light precipitation
Cloud base height3 - highLow-density cloud only.. Along-track only.W-band cloud radar around 94 GHz
Cloud drop effective radius1 - primaryLow-density cloud only.. Along-track only.W-band radar (around 94 GHz) for non-precipitating drops
Cloud ice4 - fairLow-density cloud only.. Along-track only.W-band radar for non-precipitating particles
Cloud ice Total Column4 - fairLow-density cloud only.. Along-track only.W-band radar (around 94 GHz) for non-precipitating particles
Cloud ice effective radius1 - primaryLow-density cloud only.. Along-track only.W-band radar (around 94 GHz) for non-precipitating particles
Cloud liquid water (CLW)1 - primaryLow-density cloud only.. Along-track only.W-band radar (around 94 GHz) for non-precipitating drops
Cloud liquid water (CLW) total column1 - primaryLow-density cloud only.. Along-track only.W-band radar (around 90 GHz) for non-precipitating drops
Cloud top height5 - marginalDense cloud only.. Along-track only.W-radar (around 94 GHz) for direct measurement of cloud top height
Freezing level height in clouds1 - primaryLow-density cloud only.. Along-track only.W-band radar (around 94 GHz). Detected as "bright-band"
Melting layer depth in clouds1 - primaryLow-density cloud only.. Along-track only.W-band radar (around 94 GHz). Detected as "bright-band"
Precipitation (liquid or solid)5 - marginalLight precipitation only.. Along-track only.W-band radar (around 94 GHz) for small drops or ice particles
Precipitation intensity at surface (liquid or solid)5 - marginalLight precipitation only.. Along-track only.W-band radar (around 94 GHz). Sensitive to boundary between precipitating and non-precipitating convective clouds