Operational processing of multi-source snow data

TitleOperational processing of multi-source snow data
Publication TypeConference Proceedings
Year of Conference1995
AuthorsHartman, R. K., Rost A. A., and Anderson D. M.
Conference Name63rd Annual Western Snow Conference
Series TitleProceedings of the 63rd Annual Western Snow Conference
Date PublishedApril 1995
PublisherWestern Snow Conference
Conference LocationSparks, Nevada
KeywordsGIS, Internet, Satellites, Snow cover

Near real-time quantitative assessments of areal extent of snow cover and snow water equivalent (SWE) provide valuable insight and information for water management, hydrologic forecasting, and emergency preparedness entities throughout the United States and Canada. Since 1986, the National Operational Hydrologic Remote Sensing Center (NOHRSC) of the National Weather Service (NWS) has provided these data in rasters and alphanumeric tabulations generated using satellite image processing, spatial interpolation, and GIS analysis.Composite use of multi-source satellite (i.e., Advanced Very High Resolution Radiometer (AVHRR) and Geostationary Operational Environmental Satellite (GEOS), point (i.e., manual and telemetered observations), and line (i.e., airborne gamma radiation surveys) data is now accomplished through the newly developed NOHRSC Operational Product Processing System (OPPS). OPPS ingests and databases classified (i.e., snow, ground, cloud, and unknown) satellite areal extent of snow cover rasters and all identified point and line samples of SWE and snow depth. OPPS generative capabilities include user prioritized composite raster generation and multi-source gridded estimates of SWE and snow depth. OPPS spatial estimation processes for SWE and snow depth combine point and line data with composited satellite areal extent of snow cover rasters. OPPS can 1) output rasters in any of several common GIS formats, 2) create displayable images with user-defined vector overlays, and 3) integrate raster data within basin boundaries to produce alphanumeric data products. OPPS products can be stored and distributed using the NOHRSC electronic bulletin board system, FTP’d over Internet to interested cooperators, and sent to NWS offices over AFOS.