2B-CLDCLASS-LIDAR

CloudSat Product Stats - Algorithm Developer Edition
Product Availability: Available for 2007-2010.
2B-CLDCLASS-lidar combines CloudSat CPR and CALIPSO lidar measurements to classify clouds into stratus (St), stratus (Sc), cumulus (Cu, including cumulus congestus), nimbostratus (Ns), altocumulus (Ac), altostratus (As), deep convective (cumulonimbus), or high (cirrus and cirrostratus) clouds. Compared with the 2B-CLDCLASS product, 2B-CLDCLASS-lidar takes advantages of more complete cloud vertical structure from lidar and radar measurements, which not only improve overall cloud detection but also provide more reliable information for cloud type characterization.  Because CPR is more sensitive to ice particles in mixed-phase clouds while lidar measurements are more sensitive to liquid droplets in mixed-phase clouds, combined CPR and CALIPSO lidar measurements offer more reliable cloud phase determination.  2B-CLDCLASS-lidar determines cloud phase for each cloud layer, which is used as an important input to improve cloud type classification.
 

Primary Publication

Process Description and Interface Control Document (PDICD)

Algorithm Specifications

Data
Popup Type Dimensions Units Range Missing Miss Op Factor Offset
REAL(4) ncloud,nray 0 to 1 -99 == 1 0
INT(1) nray 0 to 10 -9 == 1 0
REAL(4) ncloud,nray km 0 to 20 -99 == 1 0
REAL(4) ncloud,nray km 0 to 20 -99 == 1 0
INT(1) ncloud,nray 0 to 8 -9 == 1 0
INT(1) ncloud,nray 0 to 2 -9 == 1 0
INT(1) ncloud,nray 0 to 10 -9 == 1 0
REAL(4) ncloud,nray 0 to 1 -99 == 1 0
UINT(1) nray -- 0 to 127 1 0
UINT(1) nray -- 0 to 127 1 0
UINT(1) nray -- 0 to 81 1 0
INT(1) ncloud,nray to -9 == 1 0
INT(1) ncloud,nray 1 to 3 -9 == 1 0
INT(1) ncloud,nray 0 to 3 -9 == 1 0
INT(1) ncloud,nray -1 to 3 -9 == 1 0
REAL(4) ncloud,nray km -9 to 12 -9 == 1 0
Geolocation
Popup Type Dimensions Units Range Missing Miss Op Factor Offset
INT(2) nray meters -9999 to 8850 9999 == 1 0
INT(2) nbin,nray m -5000 to 30000 -9999 == 1 0
REAL(4) nray degrees -90 to 90 1 0
REAL(4) nray degrees -180 to 180 1 0
REAL(4) <scalar> degrees -90 to 90 1 0
REAL(4) nray seconds 0 to 6000 1 0
REAL(4) nray km 600 to 800 1 0
REAL(4) <scalar> degrees -90 to 90 1 0
REAL(8) <scalar> seconds 0 to 6e+008 1 0
REAL(4) <scalar> seconds 0 to 86400 1 0
REAL(4) <scalar> m to -9999 == 1 0

Related News Articles

2016

CloudSat releases algorithm uncertainty study

September 1, 2016
The CloudSat algorithm development leads have completed a synthesis of algorithm uncertainties. The synopsis describes the known uncertainties in the Cloudsat algorithms and provides the relevant technical and peer reviewed references for data end-users. The algorithm development team plans to update the document periodically as new data releases become available.