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Re: [gpsd-users] gpsrinex: collecting one 24h GPS-day?
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-users] gpsrinex: collecting one 24h GPS-day? |
Date: |
Wed, 25 Sep 2019 09:53:40 -0700 |
Yo Greg!
On Wed, 25 Sep 2019 12:36:31 -0400
Greg Troxel <address@hidden> wrote:
> Collecting overlong and trimming seems more likely to get you what you
> want.
The important part is a time length that is modulo the GPS
orbits. So 12h and 24h are the most accurate.
> Keep in mind that teqc is not open source, and is thus not portable.
It also does not hanlde RINEX 3. So pass on teqc.
> But it seems almost certain that
> there will be tools to munge RINEX around, since so many need them.
Lots of good ones. GPSTk, RTKLIB, etc. But easiest to just capture the
data properly.
> (emacs might even work - I haven't tried.)
RINEX files have consistency records, getting them to match by hand is a
PITA.
> Also, it would be nice if gpsrinex could take a start time.
Just start it when you want it to start. cron can do that nicely.
> I am
> unclear on if "-i 30" lines up to gps times N, such that N % 30 is
> reliably 0.
Yes, many of the PPP services are old and crusty FORTRAN that fails if
that is not true.
> The man page doesn't say this, and I'm not sure you need
> it,
Yes, to both.
> but if you are OCD enough to want PPP (as you should be!),
> presumably you'd want everything to be as in order as nonhumanly
> possible, even if you're not sure exactly why :-)
PPP shows you a bunch of stuff that was not previously obvious..
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
address@hidden Tel:+1 541 382 8588
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Re: [gpsd-users] gpsrinex: collecting one 24h GPS-day?, Gary E. Miller, 2019/09/25