Wave-radio iGPS-M, User Manual

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iGPS-M USER’S MANUAL
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PFST,PPS – PPS signal
The pulse per second message. Indicates the parameters of the PPS pulse that will
shortly be outputted. Provides the current GPS time and timing correction of the coming
PPS pulse.
Format: $PFST,PPS,wwww,tttttt,n,xxxx*hh <CR><LF>
Example: $PFST,PPS,1161,309566,9,495*67
Parameter Description Example
wwww GPS Week, i.e. number of full weeks elapsed since
midnight 5-6 January 1980.
1161 weeks
tttttt Time of Week (seconds from the beginning of the current
GPS week).
309566 sec.
n Number of satellites used when calculating the
solution.
9 satellites
xxxx Short-time pulse offset of the physical PPS pulse signal
(units of 0.01 ns, in range of approx. -15.3 .. 15.3
ns). The correct pulse time can be calculated by
subtracting this offset from the physical PPS pulse
instant.
4.95 ns
hh Check sum 67