Spectracom Format 3
Format 3 provides a format identifier, time synchronization status character, year, month, day, time with time zone and DST corrections, time difference from UTC, Standard time/DST indicator, leap second indicator and on-time marker. The Format 3 data structure is shown below:
Example message:
FFFFI^YYYYMMDD^HHMMSS±HHMMD L # CR LF
Where:
FFFF | Format Identifier (0003) |
I | Time Sync Status (Space, ?, *) |
^ | Space separator |
YYYY | Year (1999, 2000, 2001, etc.) |
MM | Month Number (01-12) |
DD | Day of the Month (01-31) |
HH | Hours (00-23) |
MM | Minutes (00-59) |
SS | Seconds (00-60) |
± | Positive or Negative UTC offset (+,-) Time Difference from UTC |
HHMM | UTC Time Difference Hours Minutes (00:00-23:00) |
D | Daylight Saving Time Indicator (S,I,D,O) |
L | Leap Second Indicator (space, L) |
# | On time point |
CR | Carriage Return |
LF | Line Feed |
The time synchronization status character (I
) is defined as described below:
? | When the receiver is unable to track any satellites and the time synchronization lamp is red. |
* | When the receiver time is derived from the battery backed clock or set manually through the Setup Port Interface. |
The time difference from UTC, ±HHMM, is selected when the Serial Com or Remote port is configured. A time difference of -0500 represents Eastern Time. UTC is represented by +0000.
The Daylight Saving Time indicator (D
) is defined as:
S | During periods of Standard time for the selected DST schedule. |
I | During the 24-hour period preceding the change into DST. |
D | During periods of Daylight Saving Time for the selected DST schedule. |
O | During the 24-hour period preceding the change out of DST. |
The leap second indicator (L
) is defined as:
(Space) | When a leap second correction is not scheduled for the end of the month. |
L | When a leap second correction is scheduled for the end of the month. |
Example:
0003 20150415 124536-0500D #
The example data stream provides the following information:
Data Format | 3 |
Sync Status | Day 271 of year 2015. |
Date | April 15, 2015. |
Time | 12:45:36 EDT (Eastern Daylight Time). The time difference is 5 hours behind UTC. |
Leap Second | No leap second is scheduled for this month. |