Meinberg GPS161 - Manual (Page 18)

18
Format of the Meinberg GPS Time String
The Meinberg Standard Time String is a sequence of 36 ASCII characters starting
with the STX (start-of-text) character and ending with the ETX (end-of-text) charac-
ter. Contrary to the Meinberg Standard Telegram the Meinberg GPS Timestring
carries no local timezone or UTC but the direct GPS time without conversion into
UTC.
The format is:
<STX>D:tt.mm.jj;T:w;U:hh.mm.ss;uvGy;lll<ETX>
The letters printed in italics are replaced by ASCII numbers whereas the other
characters are part of the time string. The groups of characters as defined below:
<STX> Start-Of-Text (ASCII code 02h)
dd.mm.yy the current date:
dd day of month (01..31)
mm month (01..12)
yy year of the century (00..99)
w the day of the week (1..7, 1 = Monday)
hh.mm.ss the current time:
hh hours (00..23)
mm minutes (00..59)
ss seconds (00..59, or 60 while leap second)
uv clock status characters (depending on clock type):
u: ‘#’ GPS: clock is running free (without exact synchr.)
‘ ‘ (space, 20h)
GPS: clock is synchronous (base accuracy is reached)
v: ‘*’ GPS: receiver has not checked its position
‘ ‘ (space, 20h)
GPS: receiver has determined its position
G time zone indicator 'GPS-Time'
y anouncement of discontinuity of time, enabled during last hour
before discontinuity comes in effect:
‘A’ announcement of leap second insertion
‘ ‘
(space, 20h) nothing announced
lll Number of leap seconds between UTC and GPS-Time
( UTC = GPS-Time + number of leap seconds )
<ETX> End-Of-Text (ASCII code 03h)