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Re: [gpsd-dev] PPS over USB

From: Håkan Johansson
Subject: Re: [gpsd-dev] PPS over USB
Date: Wed, 2 May 2012 22:42:42 +0200
User-agent: Alpine 2.00 (DEB 1167 2008-08-23)

On Wed, 2 May 2012, Dave Taht wrote:

the ublox 6 has a special mode for single sat operations.

Also the oncore has this mode. I do not remember if the patches bypass the 'require-2d-fix to allow PPS timing' when the oncore device reported time as collected in this mode got into gpsd. I'd need to get my equipment running again...


On Wed, May 2, 2012 at 1:07 PM, Chris Kuethe <address@hidden> wrote:
On Wed, May 2, 2012 at 12:53 PM, Gary E. Miller <address@hidden> wrote:
On Wed, 2 May 2012 07:11:07 -0500 Jim Thompson <address@hidden> wrote:
tl;dr: One bird won't do.

And in fact gpsd knows this and refuses to use the time until several
2D fixes have been sent from the GPS.  That is per the Garmin

I should probably test gpsd's opinion on this.

I have a few timing receivers that will, after running a site survey,
operate with only a single PRN in track. I believe the NMEA output
claims it's operating in 3D mode, and there's some status bit in the
binary protocol to say "well, actually it's in fixed-position timing

GDB has a 'break' feature; why doesn't it have 'fix' too?

Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608

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