“…Following this innovation, this technique is now frequently used in sonar imagery (Gough & Hayes, 2004). The first studies in synthetic aperture sonar occurred in the 1970's with some patents (Gilmour, 1978, Walsh, 1969, Spiess & Anderson, 1983 and articles on SAS theory by Cutrona (Cutrona, 1975(Cutrona, , 1977.…”