  In this work we study the statistical model of source localization based on
Range Difference measurements. We investigate the case of planar localization
of a source using a minimal configuration of three non aligned receivers. Our
analysis is based on a previous work of the same authors concerning the
localization in a noiseless scenario. As the set of feasible measurements is a
semialgebraic variety, this investigation makes use of techniques from
Algebraic Statistics and Information Geometry.
