Yo Mark! On Mon, 21 May 2018 19:21:25 +0000 Mark Sims <[email protected]> wrote:
> It looks like you have slipped a decimal point somewhere (also that
> "ps" label is wrong).
Yes, seemed 10x too high to me too. But the doc for UBX-TIM-TP clearly
says 'ps'.
UBX-TIM-TP:
qErr ps Quantization error of time pulse (not supported
for the FTS product variant).
Here is another data point, with the raw data so you can check the decode:
Class: TIM(0xd) ID: TP(0x1), len: 0x10
payload: f0fb550900000000e7d6ffffd2070a00
tow:1566300.000000000 qErr:-0.000000105210 ps, week:2002
flags:0xa refInfo:0x0
is GPS, UTC available
Sure looks like 105 nano seconds to me. If I'm wrong I'd love to know
where.
> I have an M8N running here and the report
> sawtooth errors are all within a +/- 10 ns span. (and LEA-5T is +/-
> 5ns).
Many things could explain the difference. We seem to only differ by 5x
or 10x.
Also, my ADEV plot clearly showed the NEO-M8N adev was better than the
NEO-M8T adev at tau=0, so your observations match mine.
Right now I'm doing a survey-in. Then I'll grab a days worth of TICC
data. After that I'll go back and get long term standard deviations
for qErr in Stationary and Survey-in modes. That, of course, will take
days.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
[email protected] Tel:+1 541 382 8588
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