Format of the time string Uni Erlangen (NTP)
The time string Uni Erlangen (NTP) of a GPS-clock is a sequence of 66 ASCII
characters starting with the STX (start-of-text) character and ending with the ETX (endof-
text) character. The format is:
<STX>tt.mm.jj; w; hh:mm:ss; voo:oo; acdfg i;bbb.bbbbn lll.lllle hhhhm<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)
|
|
tt.mm.jj
|
the current date:
|
tt
|
day of month |
(01..31) |
|
mm
|
month |
(01..12) |
|
jj
|
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, oder 60 while leap second) |
|
|
v
|
sign of the offset of local timezone related to UTC
|
|
oo:oo
|
offset of local timezone related to UTC in hours and minutes
|
|
ac
|
clock status characters:
| a: |
'#' clock has not synchronized after reset |
|
|
' ' (space, 20h) clock has synchronized after reset |
| c: |
'*' GPS receiver has not checked its position |
|
|
' ' (space, 20h) GPS receiver has determined its position |
|
|
d
|
time zone indicator:
| 'S' |
MESZ European Summertime, daylight saving enabled |
| ' ' |
European Standard Time, daylight saving disabled |
|
|
f
|
anouncement of discontinuity of time, enabled during last hour before discontinuity comes in effect:
| '!' |
announcement of start or end of daylight saving time |
| ' ' |
(space, 20h) nothing announced |
|
|
g
|
anouncement of discontinuity of time, enabled during last hour before discontinuity comes in effect:
| 'A' |
announcement of leap second insertion |
| ' ' |
(Leerzeichen, 20h) kein Zeitsprung angekündigt |
|
|
i
|
leap second insertion
| 'L' |
leap second is actually inserted (active only in 60th sec.) |
| ' ' |
(space, 20h) no leap second is inserted |
|
|
bbb.bbbb
|
latitude of receiver position in degrees
leading signs are replaced by a space character (20h)
|
|
n
|
latitude, the following characters are possible:
| 'N' |
north of equator |
| 'S' |
south d. equator |
|
|
lll.llll
|
longitude of receiver position in degrees
leading signs are replaced by a space character (20h)
|
|
e
|
longitude, the following characters are possible:
| 'E' |
east of Greenwich |
| 'W' |
west of Greenwich |
|
|
hhhh
|
altitude above sea level in meters
leading signs are replaced by a space character (20h)
|
|
<ETX>
|
End-Of-Text (ASCII-Code 03h)
|
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