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

Volume

3

fYear

1998

fDate

6-10 Jul 1998

Firstpage

1544

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International

Conference_Location

Seattle, WA

Print_ISBN

0-7803-4403-0

Type

conf

DOI

10.1109/IGARSS.1998.691583

Filename

691583