Vaisala RVP900 - Random Phase Second Trip Processing Algorithm

RVP900 measures the phase of the transmitted pulse and the phase locking is done digitally
as opposed to the traditionally locking COHO.
Klystron Radars
For a Klystron radar, the phase is controlled by RVP900 through a digital phase shifter that
is precisely calibrated. Typically the Klystron COHO is phase shifted so that each transmit
pulse has a
dierent phase.
The sequencing is controlled by RVP900.
7.9.1 Random Phase Second Trip Processing Algorithm
The following figure shows a schematic of the data processing for random phase. The figure
shows the Doppler spectra for the first and second trip in the processing stages. The vertical
scale is in dB and the horizontal scale is velocity. In this example, the second trip echo is
shown as being stronger than the
first trip echo (usually the reverse is true).
Chapter 7 – Processing Algorithms
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