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

fYear

2007

fDate

23-28 July 2007

Firstpage

4101

Lastpage

4104

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IGARSS.2007.4423751

Filename

4423751