mandatory rules for implementing and regular usage of them 
in their routine work. 
ACKNOWLEDGEMENTS: 
The author is very much thankful to the Head, CSRE, I.I.T. Bombay 
for all the encouragement in preparation of the paper. 
REFERENCE 
l. Volumes containing lecture notes at various training 
programmes conducted at CSRE, I.I.T. Bombay during 1981-88 
2. Remote Sensing Training and Educational opportunities in 
India. ISRO Publication May 1987 
125