Mq. Bao et al., A new nonlinear integral transform relating ocean wave spectra to phase image spectra of an along-track interferometric synthetic aperture radar, IEEE GEOSCI, 37(1), 1999, pp. 461-466
Citations number
17
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
The along-track interferometric synthetic aperture radar (AT-INSAR) has the
potential to measure ocean surface currents and ocean surface waves. We ha
ve derived a new nonlinear integral transform that relates the ocean wave s
pectrum to the AT-INSAR phase image spectrum. This integral transform is ob
tained from an approximation of the mapping integral that includes the radi
al component of the velocity of the scatter elements and velocity bunching.
However, it neglects the modulation of the normalized radar cross section
by the long ocean waves, which has a small effect on the AT-INSAR phase. Un
der the assumption that the imaging is only weakly nonlinear, the nonlinear
integral transform can be further simplified, In this case, the relationsh
ip between the AT-INSAR phase image spectrum and the ocean wave spectrum ca
n be described by a linear transfer function.