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Re: GPSD For Real Time Application


From: Kashyap Gada
Subject: Re: GPSD For Real Time Application
Date: Wed, 1 Jan 2020 00:12:38 +0530

Dear Greg,
>It sounds to me like you have a lot of things to figure out, but that
>most of those are not about gpsd.  gpsd is mostly about format
>conversions and distribution.

Couldn't agree with you more but if you look at my first post I've tried to restrict my questions to gpsd (leaving aside point 2). Later I may have moved off track responding to replies with more questions. Apologies for that. But I too don't have all the answers yet. For example - I asked 'gpsd accepts all what gps sends to it and forwards it even at higher frequency' - Here Gary  responded that gpsd forwards at lower frequency. It isn't clear. Does it mean that if we require to interface a gnss receiver with more than 10hz update rate the same wont reflect on the client side? If yes, then i dont feel it would serve any purpose to someone who want full speed update rate.

>Posting information about 24h gpsprof runs will be useful to others.
>(In general people who haven't measured results have a much higher
>impression of GPS/GNSS accuracy than those who have.)
Really dont mind sending the report, if only I could generate one. I have kept it ON today and its still running from last 15 minutes. So hopefully ill be able to share a report tomorrow same time.

>Keep in mind that with gpsprof, it will show statistics relative to the
>average observation, which is different from the correct result.  So you
>may want to higher a surveyor to establish a control point for your
>static tests.
Could you please elaborate the last sentence. Did you mean 'hire' a surveryor ? If yes could you please explain what the surveyor do?

I am extremely thankful to the community and apologies for off topic questions.

Regards - Happy New Year 2020

On Tue, Dec 31, 2019 at 8:48 PM Greg Troxel <address@hidden> wrote:
It sounds to me like you have a lot of things to figure out, but that
most of those are not about gpsd.  gpsd is mostly about format
conversions and distribution.

Posting information about 24h gpsprof runs will be useful to others.
(In general people who haven't measured results have a much higher
impression of GPS/GNSS accuracy than those who have.)

Keep in mind that with gpsprof, it will show statistics relative to the
average observation, which is different from the correct result.  So you
may want to higher a surveyor to establish a control point for your
static tests.



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