Metek MRR-2 - Processed and Averaged Data Format

Page 34 Micro Rain Radar MRR-2 METEK
2012-02-29 Valid for MRR Service Version 6.0.0.3 / Firmware 6.00
6.4 Processed and averaged data
6.4.1 Format description
Processed and averaged data are archived in two separate directory
structures (see chapter 7.1.2 Data Recording on page 46). Optional recording
of so called raw spectra which represent the unprocessed measuring data of
the MRR-2, is possible.
The data format is human readable ASCII text. Each data set consists of one
line. The order of the data lines and the used identifiers are listed below:
Identifier
Meaning
Unit
Remark
MRR
Header Line
n.A.
H
Height
m
TF
Transfer
Function
dimensio
nless
Fnn
Spectral
Reflectivities
dB

nn
with 
nn
in m
-1
nn from
)(
min
hnn
to
)(
max
hnn
3
Dnn
Drop Size
mm
Center of size class
Nnn
Spectral Drop
Densities
m
-4
N(D
nn
)
4
PIA
Path Integrated
Attenuation
dB
Z
Radar
Reflectivity
dBZ
















)(
)(
1
6
11
6
3
max
min
(
2
10log10
hnnnn
hnnnn
nnnn
nnnnnnnn
DD
DNDN
with
0;0
1)(1)(
minmin

 hnnhnn
DN
z
Attenuated
Radar
Reflectivity
dBZ
The attenuated radar reflectivity factor  is calculated
in the same way as Z except that attenuated spectral
drop densities 

are used. They differ from 

by
the constant factor   

:


 


RR
Rain Rate
mm h
-1
LWC
Liquid Water
Contents
g m
-3
W
Fall Velocity
m s
-1
3
See MRR-Physical Basics for details.
4
See MRR-Physical Basics for details.