Then the total propagation distance can be obtained by the initial value [R.sub.o] and the
range rate. The expression is
For radars that are in motion relative to the target, Equation 1 would be modified by adding the relative
range rate of the radar to that of the target.
The system rejects targets with
range rates greater than some value, for example, 10 mph, eliminating false alarms caused by ground clutter.
A passive infrared tracking sensor has already demonstrated the ability to accurately track kinetic projectiles at
range rates and data rates at or near the programme requirements, says the Army Research Laboratory.
In Italy, the Lower and Mid
Range rates decreased quite dramatically by 7.5 per cent and 8.2 per cent respectively.