Method to resolve phase ambiguities in a phase measurement

Abstract From the Canadian patent

In a method to resolve ambiguities in a phase measurement for application in radar interferometry a frequency, estimation method is used starting from conjugate complex, products of pairs of adjacent pixels in an interferogram. The resolution of these products is subsequently reduced through successive addition or averaging, after which the differential phase of adjacent resolution levels is determined in each resolution level. The sum of the phase differences yields the estimated value for the phase gradient which is then used in a known method, such as the least-squares method to reconstruct, the absolute phase, thus resolving the phase ambiguities. The method according to the invention …