Chapter 7 __________________________________________________ Host Computer Commands
VAISALA______________________________________________________________________ 263
HClass is 1D speckle filtered when either Lsr or Dsr is set.
0916-071
This number defines the multiplicative constant that converts the signal
power in dB to the units of the 12-bit "Log of power in sample" time series
outputs. One fourth of this slope is used to generate the "Log of Measured
Noise Level" output from GPARM (word 6). The recommended value to
use here is 0.03 (1966). This gives a dynamic range of 122 dB in 12 bits.
0916-072
Reflectivity values below this level can result in thresholding of data, if the
threshold control flags (see below) include LOG Noise bits. The threshold
value is always non-negative, and the comparison test is described in
section Section 6.4 Thresholding on page 224.
0916-073
The clutter correction threshold is a bound on the computed log receiver
adjustment for clutter. These corrections (in dB) are always negative. Any
clutter correction which is more negative than the above value can result in
thresholding of data.
CCB Circular Autocorrelation Bias correction. Setting this bit
causes non-windowed spectra to produce autocorrelation
terms that exactly match those that would be computed by
traditional PPP sums, that is, with the spurious end-around
term removed.
Lsr Lsr 1D reflectivity speckle remover. When set, range
speckles in dBT, dBTa, dBZ, dBZa, SNR, ZDR, LDRH,
and LDRV are removed.
Dsr Dsr 1D Doppler speckle remover. When set, range speckles
in V, W, PhiDP, PhiH, PhiV, RhoHV, RhoH, RhoV, and
KDP are removed.
Rnv Range normalization of reflectivity data. This bit also
enables intervening gas attenuation correction.
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