USER’S MANUAL__________________________________________________________________
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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 6.9.1 Linear Ramp of Velocity
with Range on page 251 can also be used as a test of RHOAB in adual-
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)/x
behavior as a function of range.
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