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:

UTC yy.mm.dd hh:mm:ss ab

Where:

Value

Description

UTC

Fixed text.

yy.mm.dd

Year, month, and date.

hh:mm:ss

Hour (on a 24-hour clock), minute, and second. The time is in UTC, not GPS.

a

An integer number representing the position-fix type:
1 = time only
2 = 1D & time
3 = currently unused
4 = 2D & time
5 = 3D & time

b

The number of GPS satellites being tracked.

Each time tag is terminated by a carriage return, line feed sequence. A typical 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.