Table 63 TopMode Bits
Bits Description
0000
Polarimetric processing (PPP) Mode is a combined time domain and frequency domain
approach that is used primarily for dual polarization applications. Data are processed in
batches of pulses.
See 7.3 Time Series Signal Processing (page 183).
0001
FFT processing mode is a dedicated frequency-domain approach; data are processed in
batches of pulses.
See 7.3.2 Frequency Domain Processing- Doppler Power Spectrum (page 185).
0010
Random phase processing mode. Data from first and second trips are dealiased in range
based on knowledge of the radar transmitter phase.
See 7.9 Random Phase Second Trip Processing (page 226).
0100
DPRT-1 processing mode. The trigger generator produces alternate short and long
pulses, and Doppler autocorrelations are computed using only the short pairs.
See 7.7 Dual PRT Processing Mode (page 220).
0101
DPRT-2 processing mode. The trigger generator produces alternate short and long
pulses, and Doppler autocorrelations are computed using both pairs.
See 7.7 Dual PRT Processing Mode (page 220).
11XX
Reserved for custom user modes.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
---------------------------------------------------------------
| | | | | | | | | | | | | | | | |
| | |UVD|PCT| Window |ZER| Filter Stabilization Delay | Input 10
|--|---|---|---|----|---|---|---|---|---|---|---|---|---|-------|
The RVP900 clutter filters are controlled by this word.
Table 64 RVP Clutter Filter Controls
Control Description
Delay
This delay is introduced prior to processing the next ray of data when Dual- PRF
velocity unfolding is enabled or the RVP900 has been reconfigured by user
commands. The delay permits the clutter filter transients to settle down following
PRF and gain switches.
The value is specified as the number of pulses, and hence, the number of filter
iterations, to wait.
ZER
If set, then the clutter filter's internal state variables are zeroed prior to waiting the
delay time. For some signal conditions, this may give better results than allowing the
filter to naturally flow into the new data.
Chapter 8 – Host Computer Commands
243
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