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3-D Structure of a Forest at L-band: Experiments Towards a Spaceborne Implementation

Cantini, Andrea (2013) 3-D Structure of a Forest at L-band: Experiments Towards a Spaceborne Implementation. Master's, University of Pisa.

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Due to its ecological importance, the monitoring of the vertical structure of forests is continuously raising the interest of the synthetic aperture radar (SAR) scientific community. In particular, SAR tomography allows reconstructing the 3-D distribution of the radar power backscattered by a forest by combining more than two SAR acquisitions with baseline diversity. Beyond specific estimation algorithms, the link between the estimated tomograms (depending in general on frequency, polarization and acquisition geometry) and physical forest structure is essential for establishing potential applications. The main objective of this seminar is to present and discuss the results of some airborne tomographic experiments, considering forest stands with different biomass levels and different species composition. The analysis has been carried out by processing an L-band multibaseline fully polarimetric data set acquired over the temperate forest of Traunstein (Germany) by means of the DLR’s E-SAR platform, and by exploiting an auxiliary Lidar acquisition and a set of ground measurements. The effects of the weather conditions on the estimated profiles have been analyzed as well by processing data acquired after a dry and a rainy period. It is worth noting that the variability of the profiles with the environmental conditions can be seen as a critical aspect for the implementation of 3-D forest structure monitoring from space. For this reason, considering a single-pass interferometric implementation as proposed for the Tandem-L mission, the impact of the inhomogeneity of the interferometric coherences on structure estimation has been quantified.

Item URL in elib:https://elib.dlr.de/83924/
Document Type:Thesis (Master's)
Title:3-D Structure of a Forest at L-band: Experiments Towards a Spaceborne Implementation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:23 September 2013
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:110
Keywords:SAR, tomography, forest vertical structure, polarimetric interferometry
Institution:University of Pisa
Department:Department of Information Engineering
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben Tandem-L Vorstudien (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Pardini, Dr.-Ing. Matteo
Deposited On:17 Sep 2013 11:11
Last Modified:13 Feb 2014 10:00

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