Chapter 5 ________________________________________________________________ Operation
VAISALA_______________________________________________________________________ 81
The transmission time and size is the following:
total 75 characters
=> 0.31 s at 2400 bps (10 bit char.)
=> 18.0 Kbytes/h, 432 Kbytes/d, 12.7 Mbytes/mo. at 4 msg/min,
uncompressed
Message interpretation:
LINES 1 and 2 are identical to that of Message number 1.
LINE 3
Example: 3 055 5 170 0 /// 0 ///
Note that the string begins with 2 spaces.
where
3 = The first number of line: detection status as follows:
0 ... 8 Cloud amount of the first layer in oktas.
9 Vertical visibility.
-1 Data missing or the ceilometer is in standby mode.
99 Not enough data (after start-up).
055 The second number of line: Height of the 1st cloud layer
(5500 ft or 550 m depending on feet or meter selection).
5 The third number of line: Cloud amount of the 2nd layer
in oktas.
170 The fourth number of line: Height of the 2nd cloud layer
(17000 ft or 1700 m depending on feet or meter
selection).
0 The fifth number of line: Cloud amount of the 3rd layer
in oktas.
/// The sixth number of line: Height of the 3rd cloud layer.
0 The seventh number of line: Cloud amount of the 4th
layer in oktas.
/// The eighth number of line: Height of the 4th cloud layer.
The reporting resolution is 100 ft or 10 m depending on feet or meter
selection. If the cloud amount is zero, the corresponding layer height is
///.
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