DocumentCode
2068097
Title
Detection of Spruce Defoliation with Microwave Radar Techniques
Author
Pulliainen, Jouni ; Heiska, Kari ; Hyyppä, Juha ; Hallikainen, Martti
Author_Institution
Helsinki University of Technology, Laboratory of Space Technology, Otakaari 5A, 02150 Espoo, Finland
Volume
2
fYear
1992
fDate
5-9 Sept. 1992
Firstpage
939
Lastpage
944
Abstract
Results achieved from microwave radar backscattering measurements of defoliating spruces are presented. Individual spruces were measured in an unechoic chamber and in outdoor conditions and the natural defoliation was simulated by gradually removing the needles of the trees. The instruments included 5, 10 and 35 GHz channels (multi-polarized). Additionally, helicopter-borne measurements of natural defoliation were carried out. The experimental results show the potential of microwave remote sensing for the detection of forest damage. The best correlations between radar signatures and defoliation were achieved using the 10 GHz linearly polarized channels.
Keywords
Backscatter; Instruments; Microwave measurements; Microwave theory and techniques; Needles; Polarization; Radar detection; Radar measurements; Radar remote sensing; Remote sensing;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 1992. 22nd European
Conference_Location
Helsinki, Finland
Type
conf
DOI
10.1109/EUMA.1992.335825
Filename
4135570
Link To Document