Interference Filter 0:None , Alg.1, Alg.2, Alg.3: 1 Threshold parameter C1:
10.00 dB
Threshold parameter C2: 12.00 dB
Provide WSR88D legacy BATCH major mode: YES Maximum range to unfold: 600.0 km
Low–PRF bins range averaged on each side: 2 Overlay power – Refl :5.0dB Vel:
8.0dB Width:12.0db LowSamps = ( 0.00000 x HiSamps ) + 6.00 :
LowPRF = ( 0.00000 x HiPRF ) + 250.00 :
This is a general implementation of a Lo/Hi Surveillance/Doppler PRF unfolding scheme that
provides the legacy features as special cases. The parameters are
defined as follows:
• The maximum range to unfold (in km) allows you to set an upper bound on how many
Doppler trips unfold according to the echoes seen in the surveillance data.
• The surveillance data set uses very few pulses and is somewhat noisy. You can choose
the number of bins that are range averaged from both sides of these bins to provide a
lower variance power estimate. A value of 0 means No averaging, a value of 1
averages 3 points, and so on.
• The unfolding algorithm
flags obscured range bins according to three dierent power
thresholds for
reflectivity, velocity, and width, and outputs these bits in the DB_FLAGS
data parameter. Each threshold is specified in decibels.
• The fundamental RVP900 operating parameters (PRF, Sample Size, and so on) all apply
to the high PRF portion of the BATCH trigger waveform. The low PRF rate and sample
size are derived from these high values using a slope and
oset. In the example, the
slopes are both 0, so that the surveillance data is
fixed at 6–pulses and 250 Hz. Making
the slopes nonzero would cause the low–PRF parameters to vary automatically if
desired.
These setup parameters are accessible through the DSP driver using the entry points
dspw_batchSetup() and dspw_batchSetup(). These use the custom opcode that is
defined separately by each major mode. The customUserOpcode_batch() is a useful
model building these entry points.
Standard Parameters in Multi-Polarization Systems
The following parameters control how the standard parameters (Total Reflectivity,
Corrected Reflectivity, Velocity, and Width) are computed in a multiple
polarization system. Applying YES with H-Xmt or V-Xmt means that data from those
transmit polarizations is used when there is more than one choice available. These selections
only apply to the Alternating and Simultaneous transmit modes.
Applying YES to Co-Rcv or Cx-Rcv means that received data from the co-channel or
cross- channel is used. The receiver question appears when dual simultaneous receivers
have been
configured.
T/Z/V/W computed from: H– Xmt :YES V– Xmt:NO
These
configurations specify whether noise correction is applied to dual-pol measurements.
Chapter 5 – TTY Non-volatile Setups
111
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