BackForwardInstrument:  CALIOP 

Instrument details
Acronym CALIOP
Full name Cloud-Aerosol Lidar with Orthogonal Polarisation
Purpose Aerosol profile, cloud top height
Short description Two-wavelengths (532 and 1064 nm), measurements at two orthogonal polarisations
Background New development
Scanning Technique Nadir-only viewing, sampling at 330 m intervals along track, near continuous profiling
Resolution Horizontal: 70 m IFOV sampled at 333 m intervals along track.  Vertical: 30 m
Coverage / Cycle Global coverage in 16 d (orbit repeat cycle) for cells of 100 km side
Mass 156 kg Power 124 W Data Rate 332 kbps

 

Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2006-06-05 to ≥2020
Last update: 2012-06-05
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
  • Lidar (Doppler lidar, backscatter lidar, lidar Dial, lidar altimeter)
Mission objectives
Primary mission objectives
  • Aerosol Optical Depth
  • Aerosol column burden
  • Aerosol effective radius
  • Aerosol mass mixing ratio
  • Aerosol type
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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
Aerosol column burden2 - very highCloud sensitive.. Along-track only.VIS/NIR backscatter lidar
Aerosol effective radius2 - very highCloud sensitive.. Along-track only.VIS/NIR backscatter lidar
Aerosol mass mixing ratio2 - very highCloud sensitive.. Along-track only.VIS/NIR backscatter lidar
Aerosol Optical Depth2 - very highCloud sensitive.. Along-track only.VIS/NIR backscatter lidar
Aerosol type2 - very highCloud sensitive.. Along-track only.VIS/NIR backscatter lidar
Cloud drop effective radius5 - marginalLow-density cloud only.. Along-track only.VIS/NIR backscatter lidar
Cloud ice2 - very highLow-density cloud only.. Along-track only.VIS/NIR backscatter lidar
Cloud ice Total Column2 - very highLow-density cloud only.. Along-track only.VIS/NIR backscatter lidar
Cloud ice effective radius5 - marginalLow-density cloud only.. Along-track only.VIS/NIR backscatter lidar
Cloud liquid water (CLW)4 - fairLow-density cloud only.. Along-track only.VIS/NIR backscatter lidar
Cloud liquid water (CLW) total column4 - fairLow-density cloud only.. Along-track only.VIS/NIR backscatter lidar
Cloud optical depth1 - primaryLow-density cloud only.. Along-track only.VIS/NIR backscatter lidar
Cloud top height1 - primaryAlong-track only.VIS/NIR backscatter lidar
Freezing level height in clouds2 - very highLow-density cloud only.. Along-track only.VIS/NIR backscatter lidar. Detected as discontinuity
Height of the top of PBL2 - very highCloud sensitive.. Along-track only.VIS/NIR backscatter lidar
Height of the tropopause2 - very highCloud sensitive.. Along-track only.VIS/NIR backscatter lidar
Melting layer depth in clouds2 - very highLow-density cloud only.. Along-track only.VIS/NIR backscatter lidar. Detected as discontinuity
PSC occurrence1 - primaryAlong-track only.VIS/NIR backscatter lidar
Aerosol volcanic ash2 - very highCloud sensitive.. Along-track only.VIS/NIR backscatter lidar
Aerosol volcanic ash Total Column2 - very highCloud sensitive.. Along-track only.VIS/NIR backscatter lidar