Title :
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
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;
Conference_Titel :
Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4403-0
DOI :
10.1109/IGARSS.1998.699533
