Title :
A new method for the compensation of the SAR range cell migration based on the chirp z-transform
Author :
Lanari, Riccardo
Author_Institution :
IRECE, CNR, Naples, Italy
fDate :
9/1/1995 12:00:00 AM
Abstract :
Precision synthetic aperture radar (SAR) data processing requires the compensation of the range-dependent range cell migration (RDRCM) phenomenon. This paper describes a new method that permits the compensation of the RDRCM effect using a nonstandard Fourier transform (FT). This operation is applied, in the two-dimensional Fourier domain, to the range signal spectrum and allows the compensation of the azimuth frequency-dependent scaling factor due to the RDRCM. The nonstandard FT is performed via a chirp z-transform that is carried out with one convolution operation and two phase multiplications
Keywords :
Fourier transforms; Z transforms; geophysical signal processing; geophysical techniques; radar imaging; remote sensing by radar; synthetic aperture radar; RDRCM; SAR imaging; SAR range cell migration; azimuth frequency-dependent scaling factor; chirp Z-transform; compensation method; convolution; data processing; geophysical measurement technique; image processing; land surface; nonstandard Fourier transform; phase multiplication; radar remote sensing; range-dependent range cell migration; synthetic aperture radar; terrain mapping; two-dimensional Fourier domain; Backscatter; Biomass; Chirp; Filtering; Radar remote sensing; Radar scattering; Remote sensing; Sun; Synthetic aperture radar; Vegetation mapping;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
