User's Manual Part 2

Processing Algorithms (draft)
RVP8 User’s Manual
April 2003
5–77
If we solve this equation for SQI=0.5 we find that the individual S
A
terms must have twice the
power of the individual
S
B
terms. This can be checked by adjusting either signal generator until
the minimum plotted SQI is 0.5, and then verifying that the average H and V powers are
identical; or, equivalently, that ZDR, LDRH and LDRV are zero.
The linear FM ramp described in Section 5.10.1 can also be used as a test of RHOAB in a
dual-receiver system. With one siggen modulated and the other fixed, one receive channel will
appear to be rotating relative to the other. If the FM modulation is such that 1/N of a full
revolution occurs per pulse at a given range, then if the sample size is N pulses we will observe
RHOAB + 0 at that range. In fact, the plot of RHOAB will show a characteristic sin(x)ńx behavior
as a function of range.