CT25K messages
MESSAGE 113, CT25K Data Message No. 1
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Example message line outputs CT02010 20 01333 01523 ///// 00000F00 |
LINE 1
SOH CT ID 20 10 STX CR LF
where
SOH = Start-of-Heading character
CT = Always CT
ID (1 character) = Unit number 0 to 9, A to Z (capitals only) Default ID = 0
20 = Always 20
10 = Always 10
STX = Start-of-Text Character
CR LF = Carriage Return + Line Feed
LINE 2
S WAVh1Vh2Vh3Vflags CR LF
where
S (1 character) = detection status:
0 = No significant backscatter
1 = One cloud base detected
2 = Two cloud bases detected
3 = Three cloud bases detected
4 = Full obscuration determined but no cloud base detected
5 = Some obscuration detected but determined to be transparent
/ = Raw data input to algorithm missing or suspect
WA (1 character) = Warning or alarm status:
0 = No alarm or warning
W = Warning
A = Alarm
h1 (5 characters) = 1st Height
If detection status is 1, 2, or 3 h1 = Lowest cloud base reported
If detection status is 4 h1 = Vertical visibility as calculated
If detection status is 0 or 5 h1 = /////
h2 (5 characters) = 2nd Height
If detection status is 2 or 3 h2 = Second cloud base reported
If detection status is 4 h2 = Height of highest signal detected
If detection status is 0, 1, or 5 h2 = /////
h3 (5 characters) = 3rd Height
If detection status is 3 h3 = Third cloud base reported
If detection status is 0, 1, 2, 4, or 5 h3 = /////
flags (8 characters) = Alarm or warning information 4-byte hex coded
|
Most significant alarm word for CT25K messages |
|
|---|---|
|
Bit1 |
Description |
| 8000 XXXX | Transmitter shut-off |
| 4000 XXXX | Transmitter failure |
| 2000 XXXX | Receiver failure |
| 1000 XXXX | DSP, voltage or memory failure |
| 0800 XXXX | Reserved for future use |
| 0400 XXXX | Reserved for future use |
| 0200 XXXX | Reserved for future use |
| 0100 XXXX | Reserved for future use |
| 0080 XXXX | Window contaminated |
| 0040 XXXX | Battery low |
| 0020 XXXX | Transmitter expire warning |
| 0010 XXXX | Heater or humidity sensor failure |
| 0008 XXXX | High radiance warning, also XXXX 0004 |
| 0004 XXXX | DSP, receiver, or laser monitor failure warning |
| 0002 XXXX | Relative humidity > 85 % |
| 0001 XXXX | Light path obstruction, receiver saturation or receiver failure |
|
Second alarm word for CT25K messages |
|
|---|---|
|
Bit1 |
Description |
| XXXX 8000 | Blower failure |
| XXXX 4000 | Reserved for future use |
| XXXX 2000 | Reserved for future use |
| XXXX 1000 | Reserved for future use |
| XXXX 0800 | Blower on |
| XXXX 0400 | Blower heater on |
| XXXX 0200 | Internal heater on |
| XXXX 0100 | Units meters if on, feet if off |
| XXXX 0080 | Polling mode on |
| XXXX 0040 | Working from battery |
| XXXX 0020 | Always 0 |
| XXXX 0010 | Always 0 |
| XXXX 0008 | Tilt beyond limit set by user, default 45 degrees |
| XXXX 0004 | High radiance warning, also 0008 XXXX |
| XXXX 0002 | Reserved for future use |
| XXXX 0001 | Reserved for future use |
CR LF = Carriage Return + Line Feed
LINE 3
ETX CR LF
ETX = End-of-Text Character
CR LF = Carriage Return + Line Feed
MESSAGE 114, CT25K Data Message No. 6
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Example message line outputs CT02060 10 01767 ///// ///// 00000F00 99 /// 0 /// 0 /// 0 /// |
LINE 1
SOH CT ID 20 60 STX CR LF
where
SOH = Start-of-Heading character
CT = Always CT
ID (1 character) = Unit number 0 to 9, A to Z (capitals only) Default ID = 0
20 = always 20
60 = always 60
STX = Start-of-Text Character
CR LF = Carriage Return + Line Feed
LINE 2
S WAVh1Vh2Vh3Vflags CR LF
where
S (1 character) = detection status:
0 = No significant backscatter
1 = One cloud base detected
2 = Two cloud bases detected
3 = Three cloud bases detected
4 = Full obscuration determined but no cloud base detected
5 = Some obscuration detected but determined to be transparent
/ = Raw data input to algorithm missing or suspect
WA (1 character) = Warning or alarm status:
0 = No alarm or warning
W = Warning
A = Alarm
h1 (5 characters) = 1st Height
If detection status is 1, 2, or 3 h1 = Lowest cloud base reported
If detection status is 4 h1 = Vertical visibility as calculated
If detection status is 0 or 5 h1 = /////
h2 (5 characters) = 2nd Height
If detection status is 2 or 3 h2 = Second cloud base reported
If detection status is 4 h2 = Height of highest signal detected
If detection status is 0, 1, or 5 h2 = /////
h3 (5 characters) = 3rd Height
If detection status is 3 h3 = Third cloud base reported
If detection status is 0, 1, 2, 4, or 5 h3 = /////
flags (8 characters) = Alarm or warning information 4-byte hex coded
As for CT25K message 1.
CR LF = Carriage Return + Line Feed
LINE 3 (Sky CONDITION)
__d_h1h1h1__d2_h2h2h2__d3_h3h3h3__d4_h4h4h4 CR LF
(note spaces)
where
d (1 character) = Data available
0 to 8 Amount of lowest layer in oktas
9 Vertical visibility only available
-1 No sky condition data available
99 Insufficient data
h1h1h1 (3 characters) = Height of the lowest cloud layer in 10 s of meters or 100 s of feet
d2 (1 character) = Cloud amount of the 2nd layer in oktas
h2h2h2 (3 characters) = Height of the 2nd cloud layer in 10 s of meters or 100 s of feet, if no 2nd layer is reported h2h2h2 = ///.
d3 (1 character) = Cloud amount of the 3rd layer in oktas
h3h3h3 (3 characters) = Height of the 3rd cloud layer in 10 s of meters or 100 s of feet, if no 3rd layer is reported h3h3h3 = ///.
d4 (1 character) = Cloud amount of the 4th layer in oktas
h4h4h4 (3 characters) = Height of the 4th cloud layer in 10 s of meters or 100 s of feet, if no 4th layer is reported h4h4h4 = ///.
CR LF = Carriage Return + Line Feed
Cloud amount and height cannot be reported until the SkyVue PRO has been operating for 30 minutes.
LINE 4
ETX CR LF
ETX = End-of-Text Character
CR LF = Carriage Return + Line Feed