Comparison of algorithms for retrieval of snow water equivalent from Nimbus-7 SMMR data in Finland

Comparison of algorithms for retrieval of snow water equivalent from Nimbus-7 SMMR data in Finland

The correlation between the brightness temperature of snow-covered terrain (dry snow) and the snow-water equivalent in Finland was investigated using Nimbus-7 SMMR data. The satellite data set covers the winters of 1978-9 through 1981-2. The correlation analysis was performed for 17 different bright...

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Veröffentlicht in:IEEE transactions on geoscience and remote sensing 1992-01, Vol.30 (1), p.124-131
Hauptverfasser: Hallikainen, M.T., Jolma, P.A.
Format: Artikel
Sprache:eng
Schlagworte:
Brightness temperature
Earth sciences
Earth, ocean, space
Exact sciences and technology
External geophysics
Frequency
Hydrology
Hydrology. Hydrogeology
Information retrieval
Microwave radiometry
Performance analysis
Polarization
Satellite broadcasting
Snow
Snow. Ice. Glaciers
Space technology
Testing
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Beschreibung
Zusammenfassung:The correlation between the brightness temperature of snow-covered terrain (dry snow) and the snow-water equivalent in Finland was investigated using Nimbus-7 SMMR data. The satellite data set covers the winters of 1978-9 through 1981-2. The correlation analysis was performed for 17 different brightness temperature functions, each involving one or several frequencies and polarizations. The highest correlation coefficients between the satellite-derived brightness temperature functions and the manually measured snow-water equivalent values were obtained by using the brightness temperature difference between 37 GHz and either 18 GHz or 10.7 GHz, vertical polarization.< >
ISSN:0196-2892
1558-0644
DOI:10.1109/36.124222