V1.4
– Apr-13
User’s Manual
Page 30 of 34
10m position deviation ≈ 33ns 1PPS deviation (typically)
100m position deviation ≈ 333ns 1PPS deviation (typically)
The NMEA messages containing absolute timing information (UTC time) are pro-
vided around 300ms after the 1PPS signal typically. This may change with the GPS
receiver setup.
The 1PPS signal is provided on a “as is” basis with no accuracy specification. It’s
NOT recommended to use 1PPS signal for accurate timing application.
The given values are based on a 10 satellite, static GPS simulator scenario.
Figure 13: 1PPS waveform (reference)
9.8 5 Hz Navigation Update Rate
User can select 1Hz or 5Hz output rate of navigation computation and message, it
supports rapid change of direction and improves accuracy on sport-related applica-
tions.1Hz is the default Navigation Update Rate, If the user want to change to 5Hz
Navigation Update Rate, Please refer to command below:
Enable 5Hz Navigation Update Rate command
·
NMEA command MID103 ($PSRF103,00,6,00,0*23)
·
OSP command MID136 (A0 A2 00 0E 88 00 00 04 04 00 00 00 00 00 00 00 0F
02 00 A1 B0 B3 )
Disable 5Hz and return to 1Hz Navigation Update Rate, command:
·
NMEA command MID103 ($PSRF103,00,7,00,0*22)
·
OSP command MID136 (A0 A2 00 0E 88 00 00 04 00 00 00 00 00 00 00 00 0F
02 00 9D B0 B3)
