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Exploring the potential of polarimetric circular SAR for glacier Monitoring: the Findel glacier case study

Parrella, Giuseppe and Ponce, Octavio and Hajnsek, Irena and Moreira, Alberto (2016) Exploring the potential of polarimetric circular SAR for glacier Monitoring: the Findel glacier case study. ESA Living Planet Symposium, 2016-05-09 - 2016-05-13, Prague, Czech Republic.

Full text not available from this repository.

Abstract

Polarimetric Synthetic Aperture Radar (PolSAR) sensors represent, nowadays, an established tool for the observation of glaciated areas. Being active microwave systems, SARs can operate in nearly all-weather conditions, during the long and dark polar winters. Moreover, exploiting the synthetic aperture concept, they are able to perform large scale and high spatial resolution observations. At dry conditions, they combine the penetration capability of microwaves into snow/ice and the sensitivity of polarimetry to different scattering mechanisms. Therefore, PolSAR measurements are sensitive to glacier surface as well as near-surface features, especially at lower frequencies (e.g. L-band). In the past few years, Circular SAR (CSAR) has become of increasing interest due to its enhanced (sub-wavelength) spatial resolution and 3-D reconstruction capability allowed by multi-angular measurements over 360°. In this sense, CSAR has the potential to provide a better characterization of the imaged scene, compared to the conventional linear modes, such as stripmap. In fact, the circular trajectory of the sensor allows to observe the scene from a number of different directions and to mitigate the dependency of the backscatter on the imaging geometry (flight direction and incidence angle). The objective of this study is to provide a physical interpretation of L-band polarimetric CSAR (Pol-CSAR) measurements of the Findel Glacier, a temperate glacier located in the Swiss Alps. The data collection took place in October 2014 and March 2015, when two airborne campaigns were flown by the F-SAR sensor of the German Aerospace Center (DLR). Data analysis and interpretation are performed applying, for the first time, a polarimetric scattering model to Pol-CSAR data. For this, the model proposed in is employed to retrieve snow and firn parameters of the shallow glacier subsurface, of relevance for the estimation of surface mass balance. Validation of the results is performed by means of ground measurements (GPR profiles, snow depth) collected in coordination with the SAR campaigns.

Item URL in elib:https://elib.dlr.de/103369/
Document Type:Conference or Workshop Item (Poster)
Title:Exploring the potential of polarimetric circular SAR for glacier Monitoring: the Findel glacier case study
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Parrella, GiuseppeUNSPECIFIEDUNSPECIFIED
Ponce, OctavioUNSPECIFIEDUNSPECIFIED
Hajnsek, IrenaUNSPECIFIEDUNSPECIFIED
Moreira, AlbertoUNSPECIFIEDUNSPECIFIED
Date:May 2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Circular SAR, glacier, polarimetric SAR, subsurface layers, firn
Event Title:ESA Living Planet Symposium
Event Location:Prague, Czech Republic
Event Type:international Conference
Event Dates:2016-05-09 - 2016-05-13
Organizer:ESA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Multi-dimensionale SAR-Auswertung
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute > SAR Technology
Deposited By: Parrella, Dr. sc. Giuseppe
Deposited On:09 Mar 2016 13:27
Last Modified:16 Jan 2017 18:33

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