Simulating correlated GA0 distributed amplitude images for SAR applications

BUSTOS, O,; FLESIA, A. G.; FRERY, A.; LUCINI, M M.

Puerto Iguazu, Misiones

Simposio; IX SELPER,- Simposio Latinoamericano de Percepción Remota; 2000

CONAE

Correlated G distributions can be used to describe the clutter seen in coherent radar images. They are derived using the square root of the generalized inverse Gaussian distribution for the amplitude bakscatter whithin the multiplicative model. A two parameter particular case of the amplitude G distribution, called GA0 constitutes a modeling improvement respect to the KA distribution when fitting urban, forested and deforested areas. This article deals with the modellng and the simulation of correlated GA0 distributed random fields. It is accomplish by means of the Inverse Transform method, applied to gaussian random fields with spacial correlation. The main advantage of this approach is  that allows the introduction of negative correlation values in the resulting process, necessary to the proper explanation of the shadowing effect in many Sar images