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Multitemporal repeat-pass SAR interferometry of boreal forests

Askne, Jan and Santoro, Maurizio and Smith, Gary and Fransson, Johan (2003). Multitemporal repeat-pass SAR interferometry of boreal forests. IEEE transactions on geoscience and remote sensing. 41:7, 1540-1550
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Abstract

Multitemporal European Remote Sensing satellites 1 and 2 (ERS-1/2) and the Japanese Earth Resources Satellite 1 (JERS-1) interferometric synthetic aperture radar (InSAR) data from a boreal forest test site in Sweden (stem volumes up to 335 m3/ha, equivalent to above-ground dry biomass of 200 tons/ha) are studied in order to estimate stem volume using coherence and backscatter. The changes of JERS-1 backscatter and ERS-1/2 tandem coherence between images are consistent over the area studied, in contrast to ERS-1/2 backscatter. A model-based regression analysis has been performed, and the use of the model for inversion is discussed and compared with other approaches found in the literature. The model parameters are discussed in terms of their relation to wind speed and temperature. Results from the different acquisitions are combined to improve the stem volume estimation. The accuracy in terms of rms error (RMSE) for standwise estimated stem volume is 10 m3/ha using ERS-1/2 coherence. Using backscatter and coherence from JERS-1 we obtain an RMSE of 30–35 m3/ha. Finally, conditions for accurate retrieval of stem volume using multitemporal InSAR observations are discussed. We conclude that C- and L-band repeat-pass InSAR can provide stem volume estimates in boreal forests with accuracies similar to those of standard in situ measurements.

Authors/Creators:Askne, Jan and Santoro, Maurizio and Smith, Gary and Fransson, Johan
Title:Multitemporal repeat-pass SAR interferometry of boreal forests
Series/Journal:IEEE transactions on geoscience and remote sensing (0196-2892)
Year of publishing :2003
Volume:41
Number:7
Page range:1540-1550
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Language:English
Publication Type:Journal article
Refereed:Yes
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Area technology > Remote sensing
Keywords:Boreal forest, European Remote Sensing satellite, Japanese Earth Resources satellite, interferometric sythetic aperature radar, multitemporal
URN:NBN:urn:nbn:se:slu:epsilon-2-77
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-2-77
ID Code:3744
Department:(S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
Deposited By: Sofia Hansson
Deposited On:03 Aug 2009 00:00
Metadata Last Modified:02 Dec 2014 10:24

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