Long logs of position and time data from STATIONARY recievers

Anyone know of availability of large volumes of position/time/date data
for fixed stations?

I'm interested in errors in GPS. Sam's and Dale's have much info on
sources and relative magnitudes. However all the plots either cover a
relatively short time or display a "total position" error. I'd like to
observe North, South, and Vertical errors independently over a time
period of up to a year.

I would also like to compare data from locations a few tens of miles to
a few hundred miles apart. The object would detecting effects of large
weather systems -- I live near tornado alley.
http://edu-observatory.org/gps/gps_accuracy.html etc. got me interested
in effects of atmospheric water vapor (see
http://www.etl.noaa.gov/technology/archive/gps/ ,
http://www.research.noaa.gov/weather/t_systems.html , etc).

Richard Owlett wrote:
[snip]

The geophysicists do a lot of this. Try starting at
--
Fred Hiltz, fhiltz at yahoo dot com

Fred Hiltz wrote:

Most of the links seem to say people routinely do what I want.

Fruitful links were
http://web.ics.purdue.edu/~ecalais/teaching/geodesy/geodesy.html
and
http://web.ics.purdue.edu/~ecalais/teaching/geodesy/EAS_591T_2003_lab_7.htm
which seems to assign as a lab exercise what I was once told couldn't be
done -- calculate geographical position from data saved as RINEX file.

Well I've got lots of homebound time available due to recent accident.
Now just what was that math Cornell attempted to teach me 40 years ago ;}

Richard Owlett wrote:


The database of USGS monuments would be a good start. There are
millions of physical locations in that and nearly every point has a good
locational history, detailed descriptions for finding it, and many of
the points have been confirmed and refined numerous times over the years.

Pick the right points and you can find locations that have been refined
recently and with the some of the best locational aids known to mankind.

That has been discussed here before, someone can tell us how to get
started on finding and downloading those lists. I shunned it as soon as
I saw it, I knew if I ever got started on looking for geologic monuments
it would somehow overwhelm me.

Jack

--
Jack Erbes in Ellsworth, Maine, USA - jackerbes at adelphia dot net
(also receiving email at jacker at midmaine.com)

Jack Erbes wrote:

One can get just the monuments list of one, two, (or
whatever), miles from a given Lat/Long from:
http://www.ngs.noaa.gov/cgi-bin/ds_radius.prl

Then all one needs to do is build a little solar powered
house over the selected monument, purchase SAWatch:
http://www.gpsinformation.net/main/sawatch.htm
Run it for a year on a laptop (with a serial connection),
and there you have all your data...

--
Jack

Get general GPS information at:
http://www.gpsinformation.net/