“…It is still necessary to relate the radial velocity to the desired geophysical parameters, but since velocity is itself a geophysical parameter this is, in principle, a simpler procedure. Recently, several groups have used the along-track interferometry technique to study ocean waves [Marom et al, 1991;Schuchman et al, 1992;Goldstein et al, 1994], currents [Goldstein et al, 1987, Shemer et al, 1993Ainsworth et al, 1994] and ship wakes [Orwig et al, 1992;Thompson et al, 1993].…”