At 09:23 PM 5/20/2018, Gary E. Miller wrote: >I do not see the keyword 'sawtooth' in the u-blox 8 doc. Can I buy a clue? UBX-TIM-TP, "Time Pulse Timedata". Look for "Quantization error of time pulse". I'm seeing this on page 359 of the ublox 8 receiver description/protocol spec book. -- newell N5TNL