The service is based on Earth Observation Terra MODIS system in spatial resolution of 250 m and temporal resolution of one day. The system supports the existing hydrological activities of the Czech Hydro-meteorological Institute.
Satellite images bring synoptic view on the snow cover dynamics in the Czech Republic with daily acquisitions. Cloud-free acquisitions, covering at least one third of the total country area, are processed into classification maps. The maps are presented as raster or vector product and can be viewed via the Google Earth & Google Maps applications.
Beside that, snow occurrence probability maps are calculated from 80 meto-stations measurements. In case of cloud coverage in the optical images the cloud information is substituted by the probabilities. This way uncertainty in the maps is reduced. So-called hybrid map is presented for further analysis. Additionally, catchments snow statistics is calculated. Graphs of snow statistics present percentage snow coverage in the catchments according to land cover types and altitude levels.
The service products are available daily via dedicated mapserver or weekly by means of flash reports in pdf sent to the user every Monday.