Where:
Rmax = maximum unambiguous range
c = speed of light (~3 x 108 ms-1)
PRF = pulse repetition frequency (s-1)
Equation 7 is an alternate form of Equation 6, which is an alternate way to compute the maximum unambiguous range, Rmax. Rmax can be determined by dividing the speed of light (c) by 2 times the pulse repetition frequency (PRF).