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EndRun Formats

The following formats provide compatibility with EndRun technology.

EndRun Time Format

Example message:

T YYYY DDD HH:MM:SS zZZ m<CR><LF>

Where:

T Time Figure of Merit character (TFOM), limited to the range 6 to 9:
9 indicates error >±10 milliseconds, or unsynchronized condition
8 indicates error <±10 milliseconds
7 indicates error <±1 millisecond
6 indicates error <±100 microseconds
YYYY Year
DDD Day of Year (001-366)
HH Hour of the day (00-23)
: Colon Separator
MM Minutes of the hour
SS Seconds (00-59), (00-60 for leap second)
z The sign of the offset to UTC, + implies time is ahead of UTC
ZZ The magnitude of the offset to UTC in units of half-hours.
If ZZ = 0, then z = +
m Time mode character, is one of:
G = GPS
L = Local
U = UTC
T = TAI
CR Carriage Return
LF Line Feed

EndRunX (Extended) Time Format

The EndRunX format is identical to the EndRun format, with the addition of two fields: the current leap second settings and the future leap second settings.

The following example message string is sent once each second:

T YYYY DDD HH:MM:SS zZZ m CC FF<CR><LF>

Where:

T Time Figure of Merit character (TFOM), limited to the range 6 to 9:
9 indicates error >±10 milliseconds, or unsynchronized condition
8 indicates error <±10 milliseconds
7 indicates error <±1 millisecond
6 indicates error <±100 microseconds
YYYY Year
DDD Day of Year (001-366)
HH Hour of the day (00-23)
: Colon Separator
MM Minutes of the hour
SS Seconds (00-59), (00-60 for leap second)
z The sign of the offset to UTC, + implies time is ahead of UTC
ZZ The magnitude of the offset to UTC in units of half-hours.
If ZZ = 0, then z = +
m Time mode character, is one of:
G = GPS
L = Local
U = UTC
T = TAI
CC The current leap seconds
FF The future leap seconds, which will show a leap second pending 24 hours in advance
CR Carriage Return
LF Line Feed