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Re: [gpsd-dev] PPS over USB

From: Gary E. Miller
Subject: Re: [gpsd-dev] PPS over USB
Date: Wed, 2 May 2012 12:53:43 -0700

Yo Jim!

On Wed, 2 May 2012 07:11:07 -0500
Jim Thompson <address@hidden> wrote:

> Thus, even a very small clock error multiplied by C (the speed at
> which satellite signals propagate) results in a large positional
> error.  An error of one microsecond corresponds to an error of 300
> meters. Therefore, GPS receivers solve for the time using the
> pseudoranges.
> 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

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
        address@hidden  Tel:+1(541)382-8588

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