GPM GROUND VALIDATION ENVIRONMENT CANADA (EC) PRECIPITATION OCCURRENCE SENSOR SYSTEM (POSS) GCPEX

Published by NASA/MSFC/GHRC | National Aeronautics and Space Administration | Metadata Last Checked: October 25, 2025 | Last Modified: 2025-09-11

The GPM Ground Validation Environment Canada (EC) Precipitation Occurrence Sensor System (POSS) GCPEx dataset is comprised of data gathered during the GPM Cold-season Precipitation Experiment (GCPEx), which took place in Ontario, Canada, January 15 - March 1, 2012. GCPEx addressed shortcomings in the GPM snowfall retrieval algorithm by collecting microphysical properties, associated remote sensing observations, and coordinated model simulations of precipitating snow. The POSS is a bi-static X-band Doppler radar designed by Environment Canada. The POSS measures a signal whose frequency is proportional to the particle Doppler velocity and whose amplitude is proportional to the particle scattering cross-section. Its measurements can be used to provide information regarding precipitation occurrence, type, rate, and raindrop size distribution.

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Complete Metadata

bureauCode	[ "026:00" ]
identifier	10.5067/GPMGV/GCPEX/POSS/DATA201
landingPage	https://search.earthdata.nasa.gov/search?q=gpmpossgcpex
programCode	[ "026:000" ]
spatial	["CARTESIAN",[{"WestBoundingCoordinate":-79.93,"NorthBoundingCoordinate":44.23,"EastBoundingCoordinate":-79.64,"SouthBoundingCoordinate":44.18}]]
temporal	2012-01-15/2012-01-15
theme	[ "Earth Science" ]