Product Availability: Full mission availability except for anomalies and maneuver data gaps.
The CloudSat Snow Proﬁle product (2C-SNOW-PROFILE) provides estimates of vertical proﬁles of snowfall rate along with snow size distribution parameters and snow water content for radar reﬂectivity proﬁles observed by the CloudSat Cloud Proﬁling Radar (CPR) which, based on an evaluation of the proﬁle and ancillary data, appear to coincide with snow at the surface. For these proﬁles, the product also estimates snowfall rate at the surface. Because of ground clutter, the CPR cannot reliably measure reﬂectivities near the surface. To overcome this limitation, the product algorithm estimates snow properties using a truncated reﬂectivity proﬁle, terminated somewhat above the surface, then uses the estimated snow properties in the bottom-most portion of the proﬁle to estimate the surface snowfall rate. For the truncated reﬂectivity proﬁle, proﬁles of size distribution parameters are retrieved using an optimal estimation algorithm which incorporates a priori information about snow microphysical properties, radar scattering properties, and size distribution parameters. Retrievals are performed only for proﬁles which appear likely to contain snow at the surface, either dry snow or snow with a small melted mass fraction. The retrieved size distribution parameter proﬁles and the a priori information are then used to calculate proﬁles of snowfall rates and snow water contents. The optimal estimation method produces uncertainty estimates for the retrieved size distribution parameters, and these uncertainties are then used to estimate uncertainties for the snowfall rates and snow water contents.
Process Description and Interface Control Document (PDICD)
|UINT(1)||nray||--||0 to 127||1||0|
|UINT(1)||nray||--||0 to 127||1||0|
|UINT(1)||nray||--||0 to 81||1||0|
|REAL(4)||nbin,nray||--||-1 to 2||-999||==||1||0|
|REAL(4)||nbin,nray||--||2 to 8||-999||==||1||0|
|REAL(4)||nbin,nray||--||1 to 2||-999||==||1||0|
|INT(1)||nray||--||-1 to 4||-1||==||1||0|
|INT(1)||nray||--||-128 to 127||0||==||1||0|
|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)||nray||seconds||0 to 6000||1||0|
|REAL(8)||<scalar>||seconds||0 to 6e+008||1||0|
|REAL(4)||<scalar>||seconds||0 to 86400||1||0|
Related News Articles
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.
2C-SNOW-PROFILE released to the CloudSat Science Team
February 10, 2013
The CloudSat DPC has released to the CloudSat Science Team the R04 version of the 2C-SNOW-PROFILE (snow water content and snowfall rate) product. After a short review period of approximately two weeks the product will be released to the general science community.
All data users are asked to review the updated documentation available on the CloudSat DPC website. In addition, we ask that you report any anomalies or questions about the product to the DPC at email@example.com before the review period has ended.
If you have any questions concerning the ordering process, contact the DPC at firstname.lastname@example.org