IMAGE FUSION

PROBLEM :

HOW DO WE GO ABOUT FUSING A MICROWAVE IMAGE AND OPTICAL IMAGE OF A SAME AREA ?

The conventional style of Georeferencing always exists. But what if we are not microwave specialists and could not identify features just by seeing?
If we go for a path and row we can find only a scene and not a specific point which we would require to georeference an image and thus fuse them. Further its a critical situation if we use a fusing of an Interfereogram.