Optimum and suboptimum estimator performance for multibaseline InSAR

Multibaseline methods have been recently proposed to reduce problems of pha se ambiguity arid data noise in SAR interferometry for topographic mapping, Both phase-only interferometry and direct processing oi the complex multib aseline data have been considered. In this paper, two non-model based multi baseline estimators and two recently proposed model based algorithms are di scussed and compared in terms of statistical accuracy of the reduced-ambigu ity phase estimate. it is shown that rnodel-based processing of the complex multibaseline data can be significantly more efficient than the other meth ods.