[time-nuts] TBolt: UTC PPS

[Tom Van Baak]

> So yes, at the ns level the two 1PPS will differ since UTC
> is not the same as UTC(USNO) or any other UTC(k) for
> that matter. Have you measured it? I would be interested
> to know what the delta is for your receiver today. You
> can also dump out the a1 and a0 corrections with binary
> commands on some GPS receivers.

The Trimble Thunderbolt is one of the GPS receivers that
will report subframe 4 data. The UTC parameters are in
TBolt packet 0x58 type 5. Right now, the numbers are:

a0 = -0.931 ns and
a1 = -5.33e-15 s/s (which is -0.460 ns/day).

/tvb