Vaisala RVP900 - Page 286

USER’S MANUAL__________________________________________________________________
284 _________________________________________________________________ M211322EN-D
RHV Selects dual polarization correlation coefficient ρ
HV
data.
8-Bit ρ
HV
Format—The correlation coefficient is
computed on the interval 0.0 to 1.0 using a square root
weighting of the unsigned byte N as:
0 : Indicates no ρ
HV
data available at this range
1 : 0.0000 (dimensionless)
2 : 0.0629
253 : 0.9980
254 : 1.0000
255 : Reserved Code
16-Bit ρ
HV
Format—The correlation coefficient is
computed on the interval 0.0 to 1.0 linearly from the
unsigned word N as:
0 : Indicates no ρ
HV
data available at this range
1 : 0.0 (dimensionless)
65534 : 1.0
65535 : Reserved Code
SQI Selects Signal Quality Index data. This dimensionless
parameter uses the same 8-bit and 16-bit data formats as
RHV ( ρ
HV
).
LDR Selects Linear Depolarization Ratio, measured either on
the horizontal receive channel while transmitting
vertically, or on the vertical receive channel while
transmitting horizontally.
8-Bit LDR Format—The level in decibels is computed
from the unsigned byte N as:
dB = 45.0 + (N1) / 5
This spans an asymmetric interval around zero decibels,
and allows for cross channel isolation as large as 45 dB.
The overall range is from -45.0 dB to +5.6 dB in 0.2 dB
steps as follows:
0 : Indicates no LDR data available at this range
1 : -45.0 dB
226 : 0.0 dB
254 : +5.6 dB
255 : Reserved Code
16-Bit LDR Format—Same as 16-bit deciBel format.
RHO Selects Signal Quality Index data. This dimensionless
parameter uses the same 8-bit and 16-bit data formats as
RHV ( ρ
HV
).
PHI Selects the cross channel differential phase. This parameter
uses the same 8-bit and 16-bit angular data formats as PDP
(φ
DP
).