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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.