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Re: [External] Re: Time precision in gps_fix_t
From: |
Gary E. Miller |
Subject: |
Re: [External] Re: Time precision in gps_fix_t |
Date: |
Wed, 22 Jan 2020 12:43:43 -0800 |
Yo Greg!
On Wed, 22 Jan 2020 15:34:51 -0500
Greg Troxel <address@hidden> wrote:
> > Multiple TPV with the same time stamp is not unusual. Care to
> > share your raw dumps?
>
> Sorry, I don't have raw dumps available to share. I will if I can
> generate some.
No rush. You are not the guy with the problems.
> This was a clear pattern of two TPV lines with the same timestamp, for
> every second.
As I said, not unusual. And not useful if not from git head code.
> > Regardless, getting time to 100 micro seconds from the serial data
> > is unlikely by at least 2 orders of magnitude.
>
> I am not talking about time sync. If one has > 1 Hz positions, you
> want to be able to have those time tagged correctly so you can
> interpolate based on your (synchronized) system clock to get
> within-second position estimates.
Of course, but the OP was concerned with time sync.
> This is a very noticable issue
> with lots of nav programs on android (probably more about not
> extrapolating the pointer, vs multiple positions per s).
Luckily, or unluckily, android is not running gpsd.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
address@hidden Tel:+1 541 382 8588
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"If you can't measure it, you can't improve it." - Lord Kelvin
pgp0B_v7pYBHQ.pgp
Description: OpenPGP digital signature
- Time precision in gps_fix_t, Marco Spanghero, 2020/01/21
- Re: Time precision in gps_fix_t, Gary E. Miller, 2020/01/21
- Re: Time precision in gps_fix_t, Greg Troxel, 2020/01/22
- [External] Re: Time precision in gps_fix_t, Burton, John, 2020/01/22
- Re: [External] Re: Time precision in gps_fix_t, Greg Troxel, 2020/01/22
- Re: [External] Re: Time precision in gps_fix_t, Gary E. Miller, 2020/01/22
- Re: [External] Re: Time precision in gps_fix_t, Greg Troxel, 2020/01/22
- Re: [External] Re: Time precision in gps_fix_t, Gary E. Miller, 2020/01/22
- Re: [External] Re: Time precision in gps_fix_t, Greg Troxel, 2020/01/22
- Re: [External] Re: Time precision in gps_fix_t,
Gary E. Miller <=
- Re: [External] Re: Time precision in gps_fix_t, Kai Harrekilde-Petersen, 2020/01/22
- Re: [External] Re: Time precision in gps_fix_t, Gary E. Miller, 2020/01/22
- Re: Time precision in gps_fix_t, Gary E. Miller, 2020/01/22
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