Investigation of sea ice and lake ice using Ground-Based SAR tomography

• Published in: 2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
• Main Authors: Gebrie Yitayew, Temesgen, Ferro-Famil, Laurent, Eltoft, Torbjorn
• Other Authors: University of Tromsø (UiT), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-CentraleSupélec-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2015
• Subjects: tomographic configuration; single polarization tomographic measurement; 2D synthetic array; Kattfjord; Norway; Prestvannet frozen lake; Tromso; X-band radar system; air bubbles; direct imaging; ground-based SAR campaign; ground-based SAR tomography; ice layers; lake ice; salinity ice; synthetic aperture radar; bubbles; Backscatter; Lakes; Nonhomogeneous media; Refractive index; Sea ice; Snow; [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing; [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing; Frozen Lake
• Online Access: https://hal.archives-ouvertes.fr/hal-01279744; https://doi.org/10.1109/IGARSS.2015.7327025

International audience In this paper we present experimental results relative to the vertical structure of snow covered lake ice and sea ice, sensed with X-band radar system operated in a tomographic configuration. The available data are from a Ground-Based SAR campaign carried out over Prestvannet frozen lake and Kattfjord, both in Tromso, Norway. Direct imaging of the vertical structures of the snow and ice layers is achieved by focusing the signal from a 2D synthetic array in the 3D space. By making use of a priori information about the depth of snow and ice, the refractive index of snow and sea ice/lake ice is estimated from a single polarization tomographic measurement, and the results are in good agreement with previous experimental results. We have also shown that air bubbles in low salinity ice are the main contributors for the backscatter signal from ice.