Справочник Пользователя для Trimble Outdoors SPSX51
SPSx51 Modular GPS Receivers User Guide
177
Receiver Connector Pinout Information
I
ASCII time tag
Each time tag is output about 0.5 second before the corresponding pulse. Time tags are
in ASCII format on a user-selected serial port. The format of a time tag is:
in ASCII format on a user-selected serial port. The format of a time tag is:
UTC yy.mm.dd hh:mm:ss ab
Where:
•
UTC is fixed text.
•
yy.mm.dd is the year, month, and date.
•
hh:mm:ss is the hour (on a 24-hour clock), minute, and second. The time is in
UTC, not GPS.
UTC, not GPS.
•
a is an integer number representing the position-fix type:
1 = time only
2 = 1D & time
3 = currently unused
4 = 2D & time
5 = 3D & time
2 = 1D & time
3 = currently unused
4 = 2D & time
5 = 3D & time
•
b is the number of GPS satellites being tracked.
•
Each time tag is terminated by a carriage return, line feed sequence. A typical
printout looks like:
printout looks like:
UTC 02.12.21 20:21:16 56
UTC 02.12.21 20:21:17 56
UTC 02.12.21 20:21:18 56
Note –
If the receiver is not tracking satellites, the time tag is based on the receiver clock. In
this case, a and b are represented by “??”. The time readings from the receiver clock are less
accurate than time readings determined from the satellite signals.
accurate than time readings determined from the satellite signals.