Title :
Focusing problems of subsurface imaging by a low-frequency SAR
Author :
Redadaa, Salah ; Caillec, Jean-Marc Le ; Solaiman, Basel ; Benslama, Malek
Author_Institution :
GET-ENST de Bretagne Technopole Brest-Iroise, Brest
Abstract :
ONERA radar RAMSES was recently upgraded with low frequency band (P-band, 435 MHz). In P-band, frequencies penetrate through the ground and through forest canopy. Unfortunately, the formation of the subsurface radar images presents a number of new specific challenges that include algorithm validity, calibration methods, radio-frequency interference, and image focusing and analysis. This paper addresses the aspects of focusing images from an airborne low frequency SAR of buried targets in a lossy and dispersive soil. The hydrological model (Richards´ equation) was used to model the multilayer case.
Keywords :
buried object detection; electromagnetic wave propagation; image recognition; moisture; radar imaging; radiofrequency interference; soil; synthetic aperture radar; terrestrial electricity; vegetation; ONERA radar; Richards equation; airborne low frequency SAR; algorithm validity; buried targets; calibration methods; dispersive soil; forest canopy; frequency 435 MHz; ground penetration; hydrological model; image analysis; images formation; radio-frequency interference; subsurface image focusing; synthetic aperture radar; Algorithm design and analysis; Calibration; Dispersion; Focusing; Ground penetrating radar; Image analysis; Radar imaging; Radio frequency; Radiofrequency interference; Soil;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-1211-2
Electronic_ISBN :
978-1-4244-1212-9
DOI :
10.1109/IGARSS.2007.4423751
