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GPM Ground Validation Environment Canada Snow Surveys GCPEx dataset contains manual snowpack measurements collected during the GPM Cold-season Precipitation Experiment. The data was gathered weekly from January 20 to February 27, 2012, across four sites in Ontario, Canada, to provide baseline ground truth for validating satellite snowfall retrieval algorithms. This dataset was produced by the National Aeronautics and Space Administration (NASA) as part of a focused field campaign.
License details are unclear ('other-license-specified'). The 2026 'last updated' date on Data.gov is implausible for a 2012 dataset and likely reflects a system metadata update rather than data modification.