@cglusky I’m surprised AP doesn’t use the PPS signal already.
I’d be super grateful if someone could let me know how tightly AP is synced to the GPS using just its serial signals, and about the magnitude of the ‘typical’ drift of the ‘average’ FC during GPS outage.
I’ve got my antenna tracker working now using an averaged estimate of the offset between UTC and boot time (using the TIMESYNC message). As this partly depends on the round trip time of the radio link (I’m using a pair of RFD868x’s), I suspect it’s not a great estimate, but I haven’t got around to quantifying the results yet.