SAR focusing: scaled inverse Fourier transformation and chirp scaling

Author

Loffeld, Otmar ; Hein, Achim ; Schneider, Frank

Author_Institution

Siegen Univ., (Germany). Centre for Sensorsyst., ZESS

Volume

2

fYear

1998

fDate

6-10 Jul 1998

Firstpage

630

Abstract

The SAR focusing process presented is realized by scaled inverse Fourier transformation. The basic idea by R. Lanari exploits the fact that the raw data spectrum is a `deformed´ replica of the scene spectrum. Removing this deformation by applying a scaled IFFT (inverse FFT) directly yields the focused image. The paper shortly reviews the derivation of the algorithm, discusses the relationship to chirp scaling algorithms, and presents some results

Keywords

geophysical signal processing; geophysical techniques; radar signal processing; remote sensing by radar; synthetic aperture radar; IFFT; SAR; SAR focusing; algorithm; chirp scaling; deformation removal; deformed replica; focused image; geophysical measurement technique; inverse FFT; inverse Fourier transform; land surface; radar remote sensing; raw data spectrum; scaled inverse Fourier transformation; scene spectrum; synthetic aperture radar; terrain mapping; Azimuth; Bandwidth; Chirp; Convolution; Data processing; Focusing; Frequency; Image coding; Layout; Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International

Conference_Location

Seattle, WA

Print_ISBN

0-7803-4403-0

Type

conf

DOI

10.1109/IGARSS.1998.699533

Filename

699533