Research article1997Open access
Retrieval of forest stem volume using VHF SAR
Israelsson, Hans; Ulander, Lars; Askne, Jan; Fransson, Johan; Frölind, Per-Olov; Gustavsson, Anders; Hellsten, Hans
Abstract
The ability to retrieve forest stem volume using CARABAS (coherent all radio band sensing) SAR images (28–60 MHz) has been investigated. The test site is a deciduous mixed forest on the island of Öland in southern Sweden. The images have been radiometrically calibrated using an array of horizontal dipoles. The images exhibit a clear discrimination between the forest and open fields. The results show that the dynamic range of the backscattering coefficient among the forest stands is higher than what has been found with conventional SAR using microwave frequencies. The backscatter increases with increasing radar frequency. This work shows an advantage compared to higher frequencies for stem volume estimation in dense forests.
Keywords
CARABAS; SAR; stem volume; VHF
Published in
IEEE Transactions on Geoscience and Remote Sensing
1997, number: 35
Publisher: IEEE - Institute of Electrical and Electronics Engineers
Publication identifier
- DOI: https://doi.org/10.1109/36.551932
Permanent link to this page (URI)
https://res.slu.se/id/publ/123973