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A method i s p r e s e n t e d f o r c o m p u t e r i z e d r e c o n s t r u c t i o n o f ground illumination from the incident field sampled during a p o l a r r a s t e r s c a n . A t e c h n i q u e i s a l s o d e s c r i b e d f o r t h e c o m p l e t e removal o f t h e d i r e c t s i g n a l component and partial suppression o f t h e e f f e c t s o f c e r t a i n measurement e r r o r s . T h i s m e t h o d o f automated range probing can aid in the accurate placement of t h e d i f f r a c t i o n fences w i t h o v e r a l l reduced probing time. I n t r o d u c t i o n The c o n v e n t i o n a l m e t h o d f o r r a n g e p r o b i n g i n v o l v e s a t i m e consuming repetitive process wherein during each s t e p t h e a r r i v a l angle o f t h e dominant i n t e r f e r i n g component i s deduced from the separation between the adjacent peaks i n t h e probe scan data. A fence i s placed at the corresponding location on the ground, and t h e s c a n i s r e p e a t e d t o c a l c u l a t e t h e a r r i v a l a n g l e s o f t h e r e m a i n i n g i n t e r f e r i n g components. The o b j e c t i v e o f t h i s p a p e r i s t o present a method by which an image of t h e ground ' h o t s p o t s ' i s generated. The method employs plane-polar scanning of the probe, due t o t h e i n h e r e n t s i m p l i c i t y i n i t s mechanical system implement a t i o n . The processing scheme employs a c o n v o l u t i o n -b a c k p r o j e ct i o n m e t h o d f o r i m a g e r e c o n s t r u c t i o n . T h i s m e t h o d u s e d extensively in X-ray computerized axial tomography E11 enables on l i n e p r o c e s s i n g o f t h e d a t a . The algorithm is simple enough t h a t it can be implemented on a desktop computer such as HP-9825. Method R e f e r r i n g t o the Fig. la, the desired polarization component o f t h e e l e c t r i c f i e l d Em(r) i s measured over the range -a-