[skinwill]

A company called Erim back in the 70's pioneered SAR systems. They had an interesting approach to processing and storage of the data which was all analog back then. They used holography. Erim and their SAR work is documented in wikipedia but their company presidents obsession with holography was detailed in their monthly news letters. I was handed some of these documents from a former (now deceased) worker at Erim. He told me how they were able to fly the massive radar systems and the huge analog computers they used to process the data. It must have been absolutely wild to work there in those days.