Title :
Investigation of passive microwave signatures over snow-covered forest areas
Author :
Kruopis, N. ; Koskinen, J. ; Praks, J. ; Arslan, A.N. ; Alasahni, H. ; Hallikainen, M.
Author_Institution :
Lab. of Space Technol., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
Airborne passive microwave signatures collected in Northern Finland during EMAC-95 is analysed with the emphasis on forested areas and dry snow conditions. The microwave signatures covers the 6.8-18.7 GHz frequency range and are acquired at vertical and horizontal polarisation. The analysis is carried out with respect to the forest stem volume data and comprises three different snow depth situations. Emissivities indicate an exponential increase with stem volume, with a subsequent saturation at higher stem volumes. At 10.65 GHz the saturation level was found to be linearly related to snow water equivalent
Keywords :
hydrological techniques; radiometry; remote sensing; snow; 6.8 to 18.7 GHz; Finland; SHF; dry snow conditions; hydrology; measurement technique; microwave radiometry; passive microwave signature; polarimetry; polarisation; remote sensing; snow cover; snow water equivalent; snow-covered forest; snowcover; snowpack; vegetated terrain; vegetation forest; Antenna measurements; Frequency; Microwave radiometry; Microwave technology; Polarization; Remote sensing; Sea measurements; Snow; Space technology; Testing;
Conference_Titel :
Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4403-0
DOI :
10.1109/IGARSS.1998.691583
