Vaisala CL31 - Page 70

USER'S GUIDE____________________________________________________________________
68 __________________________________________________________________ M210482EN-D
3RD LINE (4TH LINE IN MESSAGE NO. 2)
Example: 00100 10 0770 098 +34 099 12 621 L0112HN15 139
where
00100 = Parameter SCALE, 100 (%) is normal (0 ... 99999 possible)
10 = Backscatter profile resolution in meters.
0770 = Length of the profile in samples 385, 770, 1400, or 1500
098 = Laser pulse energy, % of nominal factory setting
(0 ... 999)
+34 = Laser temperature in degrees C (-50 ... +99)
099 = Window transmission estimate % (0 ... 100)
12 = Tilt angle, degrees from vertical (0 ... 90)
0621 = Background light, millivolts at internal ADC input
(0 ... 2500)
L0112
HN15
= Measurement parameters (pulse
Long/Short, pulse qty 0112x1024, gain
High/Low, bandwidth Narrow/Wide, sampling 15/30 MHz)
L = Long pulse
0112 = Pulse quantity
H = High gain
N = Narrow bandwidth
15 = 15 MHz sampling rate
139 = SUM of detected and normalized backscatter,
0 ... 999. Multiplied by scaling factor times 10
4
. At scaling factor 1.0 the SUM
range 0 ... 999 corresponds to integrated backscatter 0…0.0999 srad
-1
.
NOTE
The next line is omitted if the message subclass is 5.
4TH LINE (5TH LINE IN MESSAGE NO. 2)
Example: 00000111112222233333........(5 x 770 bytes)
The two-way attenuated backscatter profile with sensitivity normalized
units (100000·srad·km)
-1
unless otherwise scaled with the SCALE
parameter. Each sample is coded with a 20-bit HEX ASCII character set;
msb nibble and bit first, 2's complement. The length of this line is equal
to 5 times the length of the profile + 2. Note that the profile is not
corrected with the tilt angle.
Using the SCALE parameter a total dynamic range of 29 bits can be
achieved for this message.
The line ends with Carriage Return and Line Feed characters.