GPM GROUND VALIDATION AUTONOMOUS PARSIVEL UNIT (APU) GCPEX V1

The GPM Ground Validation Autonomous Parsivel Unit (APU) GCPEx dataset was collected by the Autonomous Parsivel Unit (APU), which is an optical disdrometer that measures the size and fall velocity of single precipitation particles. The APU consists of the Parsivel (the precipitation measuring instrument), developed by OTT in Germany, and its support systems, which were designed and built by the University of Alabama in Huntsville. The GPM Cold-season Precipitation Experiment (GCPEx) addressed shortcomings in the GPM snowfall retrieval algorithm by collecting microphysical properties, associated remote sensing observations, and coordinated model simulations of precipitating snow. These data sets were collected to aid in the achievement of the over arching goal of GCPEx which is to characterize the ability of multi-frequency active and passive microwave sensors to detect and estimate falling snow. The APU dataset for GCPEx provides precipitation data including raindrop size, raindrop counts, precipitation drop size, precipitation rate, precipitation amount, and snowflake size, counts and distribution. The GCPEx APU data was collected from several sites in Canada during the Winter 2011-2012 period.

Data and Resources

Field Value
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
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citation Petersen, Walter A, Ali Tokay, Patrick N Gatlin and Matthew T. Wingo.2013. GPM GROUND VALIDATION AUTONOMOUS PARSIVEL UNIT (APU) GCPEX [indicate subset used]. Dataset available online from the NASA Global Hydrology Resource Center DAAC, Huntsville, Alabama, U.S.A. DOI: http://dx.doi.org/10.5067/GPMGV/GCPEX/APU/DATA301
identifier C1625128673-GHRC_CLOUD
issued 2013-04-16
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1625128673-GHRC_CLOUD.html
language {en-US}
metadata_type geospatial
modified 2018-11-13
programCode {026:001}
publisher NASA/MSFC/GHRC
resource-type Dataset
source_datajson_identifier true
source_hash 8d30615638b47a201df80539478e812479e39f18
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-79.9279, 44.1765], [-79.6403, 44.1765], [-79.6403, 44.6862], [-79.9279, 44.6862], [-79.9279, 44.1765]]]}
temporal 2011-10-26T20:22:00Z/2012-03-10T23:59:50Z
theme {GCPEx,geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • atmosphere
  • ckan
  • earth-science
  • geo
  • geoss
  • national
  • north-america
  • precipitation
  • united-states
isopen False
license_id notspecified
license_title License not specified
maintainer undefined
maintainer_email support-ghrc@earthdata.nasa.gov
metadata_created 2025-11-22T22:00:42.202251
metadata_modified 2025-11-22T22:00:42.202255
notes The GPM Ground Validation Autonomous Parsivel Unit (APU) GCPEx dataset was collected by the Autonomous Parsivel Unit (APU), which is an optical disdrometer that measures the size and fall velocity of single precipitation particles. The APU consists of the Parsivel (the precipitation measuring instrument), developed by OTT in Germany, and its support systems, which were designed and built by the University of Alabama in Huntsville. The GPM Cold-season Precipitation Experiment (GCPEx) addressed shortcomings in the GPM snowfall retrieval algorithm by collecting microphysical properties, associated remote sensing observations, and coordinated model simulations of precipitating snow. These data sets were collected to aid in the achievement of the over arching goal of GCPEx which is to characterize the ability of multi-frequency active and passive microwave sensors to detect and estimate falling snow. The APU dataset for GCPEx provides precipitation data including raindrop size, raindrop counts, precipitation drop size, precipitation rate, precipitation amount, and snowflake size, counts and distribution. The GCPEx APU data was collected from several sites in Canada during the Winter 2011-2012 period.
num_resources 6
num_tags 11
title GPM GROUND VALIDATION AUTONOMOUS PARSIVEL UNIT (APU) GCPEX V1