SABRINA: A SAR Bistatic Receiver for Interferometric Applications

Author

Sanz-Marcos, Jesus ; Lopez-Dekker, Paco ; Mallorqui, Jordi J. ; Aguasca, Albert ; Prats, Pau

Author_Institution

Remote Sensing Lab., Univ. Politecnica de Catalunya, Barcelona

Volume

4

Issue

2

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

307

Lastpage

311

Abstract

This letter discusses the implementation of SABRINA, Synthetic Aperture radar Bistatic Receiver for Interferometric Applications. The ground resolution of a fixed-receiver bistatic system is studied, showing that it is comparable to that of a monostatic system. Due to the short distance from target to receiver, large sensitivity is obtained. The noncooperative nature of the bistatic system forces a conservative data-acquisition strategy based on continuously sampling the scattered signal during a temporal window around the predicted satellite overpass time. Also, to be able to synchronize the system in time and in frequency, sampling of a direct signal obtained through an antenna pointed at the satellite is required. Besides the signal processing required to phase-lock the received signal, the bistatic synthetic aperture radar processing needs to take into account the azimuth-dependent phase history. First focused images obtained with the SABRINA-ENVISAT combination are discussed

Keywords

data acquisition; geophysical signal processing; geophysical techniques; radar receivers; radiowave interferometry; remote sensing by radar; signal sampling; synthetic aperture radar; ENVISAT; SABRINA; Synthetic Aperture radar Bistatic Receiver for Interferometric Applications; azimuth-dependent phase history; data acquisition; fixed-receiver bistatic system; scattered signal sampling; signal phase-locking; signal processing; temporal window; Focusing; Frequency synchronization; History; Image sampling; Radar scattering; Radar signal processing; Satellite antennas; Signal processing; Signal resolution; Signal sampling; Bistatic synthetic aperture radar; interferometry; sensor of opportunity; synthetic aperture radar (SAR);

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2007.894144

Filename

4156170