Useful GPS Coordinates Near Langmuir Lab
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R.Sonnenfeld
Version 0.2 5/10/2005 Collected from notebooks but not checked
Version 1.0 6/20/2006 GPS Readings repeated and checked.
All #'s are direct GPS readings, rounded to a reasonable # of decimal
places.

GPS provides geodetic (rather than geocentric) coordinates.
GPS uses WGS-84 which in turn references as sea-level the 
GRS80 reference ellipsoid. This ellipsoid was chosen to have same volume
as the "geoid" (the average position of actual sea-level on the Earth).
However the reference ellipsoid is a true and perfect ellipsoid with 
semi-major axis (at the equator) of 6378.1 km, and a semi-minor axis
(to the poles) of 6356.7 km.

For our calculations use R-earth=6380 km and assume a sphere.
1 degree latitude =111.352 km 
Assume Lat=34.000 degrees,  cosine(34.0)=0.8290375
1 degree longitude=92.315 km
1 meter approx 1E-5 degrees.

Langmuir Lab Annex
33.97521 N 107.18113 W 3255.9 meters  [confirmed 6/2006]
33.9753322 N -107.18092 W 3256.00 
[Checked against Google maps ... is center of annex observation window]

10 and 20 km due South of Langmuir Lab Annex 
33.88540 N and  33.79560 N and  107.18113 W

Langmuir Lab Balloon Hangar (7 paces N of main doors - cement pad) [conf 6/06]
33.98225 N 107.18820 W 3226.4 meters

Langmuir Lab Balloon Hangar (theodolite pad)--verified 7/2005 [conf 6/06]
33.98225 N 107.18860 W 3230.0 meters

Langmuir Lab Balloon Hangar (Radome)--verified 7/2005 [conf 6/06]
33.98191 N 107.18838 W 3226.0 meters

Langmuir Lab West Knoll 
33.97825 N 107.1939 W 3163 meters
The altitude is taken from the LMA station at West Knoll.  The coordinates
are tweaked slightly because the interferometer is closer to the trailer
than the LMA is.
This location is where the digital interferometer
operated Summer 2012, 2013, 2014, 2015.

Pound Ranch (location of 2nd INTF)
34.0902 N    107.0895 W  1843 meters

Kivas (upper) Measured [6/2006]
33.99097 N 107.18802 W 3288.0 meters

Kivas (lower) Measured [6/2006]
33.99062 N 107.18806 W 3285.0 meters

Ft. Craig (LMA) from LMA.loc file
33.99062 N 107.18806 W 3285.0 meters

Point 00 
33.99052 N 107.15342 W 2751.2

Point 0 
33.99303 N 107.14426 W 2480.6 m

Workman Center Roof (CHECKED 2007)
34.06617 N 106.90744 W 1432.0 m
34 03' 58.2" 106 54' 26.8"

Socorro Tech Hill  (KNMSOCOR2 weather station - wunderground.com)
34.062 N 106.908 W 1426.5 m

Socorro (Calle de Largo) (KNMSOCOR1 weather station - wunderground.com)
34.071 N 106.910 W 1409.0 m