Vaisala CL31 - CL31 Data Messages No. 1 and 2; Table 10 Messages with 10 M Resolution (Standard Mode)

Chapter 5 ________________________________________________________________ Operation
VAISALA_______________________________________________________________________ 63
CL31 Data Messages No. 1 and 2
Data message No. 1 contains cloud height/vertical visibility measurement
and elementary status information that enables a host system or operator
to see that no warnings or alarms are present. This message also includes
a range and sensitivity normalized backscatter profile that is suitable, for
example, for a graphical data presentation or research purposes. In
addition to the content of data message No. 1, data message No. 2 also
includes sky condition data.
The data resolution is 5 m/10 m/20 m (16 ft/33 ft/66 ft) in distance, and
20 bits (five hex-ASCII characters) in signal magnitude.
An example of CL31 data message No.1 is presented below:
CLA10011 1st line 12 char.
30 01230 12340 23450 FEDCBA987654 2nd line 35 char.
00100 10 0770 098 +34 099 12 0621 L0112HN15 139 3rd line 49 char.
00000111112222233333 ... (5 x 770 bytes) 4th line 3852 char.
1a3f 5th line 8 char.
Total 3956 char.
An example of CL31 data message No. 2 is presented below:
CLA10021 1st line 12 char.
30 01230 12340 23450 FEDCBA987654 2nd line 35 char.
3 055 5 170 0 /// 0 /// 0 /// 3rd line 37 char.
00100 10 0770 098 +34 099 12 0621 L0112HN15 139 4th line 49 char.
00000111112222233333 ... (5 x 770 bytes) 5th line 3852 char.
1a3f 6th line 8 char.
Total 3993 char.
For data lines with low bandwidth, there is also a base version of each
message. In the short version of message No.1, lines 3 and 4 are left out.
In the base version of message No.2, lines 4 and 5 are left out. In the
table below, the data message types are summarized with the minimum
bit rates and storage capacity. The examples are divided into
measurement resolutions of 10 m and 5 m. They have minimum
reporting intervals of 2 s and 3 s, respectively.
Table 10 Messages with 10 m Resolution (Standard Mode)
Message
Number
and
Subclass
Message Name Length
(bytes)
Min bps
(2 s)
Data/Month
(2 s)
Min bps
(12 s)
Data/Month
(12 s)
11 msg1_10x770 3956 28.8k 4890 MB 4800 815 MB
12 msg1_20x385 2031 14.4k 2510 MB 2400 418 MB
15 msg1_base 55 300 68 MB 300 11 MB
21 msg2_10x770 3993 28.8k 4940MB 4800 423 MB
22 msg2_20x385 2068 14.4k 2560 MB 2400 425 MB
25 msg2_base 92 600 114 MB 300 19 MB