In the CWEX11 S directory at EOL is a file of Splus code, latlonalt.q, for computing averages of the GPS values of latitude, longitude and altitude.
I ran it on 6 days of data from Jul 9 11:15 to Jul 15 16:00 (arbitrary period), and it returned the following:
stn |
Lat(deg) |
Lat stddev(deg) |
Lon(deg) |
Lon stddev(deg) |
Alt(m) |
Alt stdev(m) |
|---|---|---|---|---|---|---|
1 |
42.06605 |
1.101896e-05 |
-93.28521 |
9.501855e-06 |
339.0 |
1.8 |
2 |
42.06977 |
1.317406e-05 |
-93.28515 |
1.091214e-05 |
340.4 |
1.8 |
3 |
42.07344 |
1.417124e-05 |
-93.28522 |
1.358779e-05 |
340.0 |
2.0 |
4 |
42.07679 |
1.39572e-05 |
-93.28523 |
1.211881e-05 |
341.6 |
2.0 |
Note that the GPS does not provide a good estimate for altitude, the std deviations are about 2 meters.
Here's a kml file viewable in GoogleEarth, cwex_ncar.kml, with the above positions.