Paul S, I have a C++ ide that allows AVR projects I have played with a little. I also have downloaded ATMEL's IDE but haven't really begun looking into it yet.
Coding Badly, In practice I need to measure to approx +/- 4,000,000.0001 meters. So an INT number in the +/- 100,000,000,000
Also based on the measurement of this output I would say the 64bit float is normalized? A different meassage outputs radians which would be 0.xxxxxxxx and would be denormallized?