The origin of the coordinate system used at Langmuir Laboratory is at sea level directly below a point near the NW corner of the Annex Building:
Latitude 33 degrees 58' 31",
Longitude 107 degrees 10' 50.6"
The point on the Annex Building is 3255 m above mean sea level, and therefore the Langmuir Laboratory coordinates of that point are (0, 0, 3255 m)
The point is 1740.6 m south, 626.8 m west, and 30.0 m below bench mark "South ET" on South Baldy Peak.
Geomagnetic coordinates (approximate): 43 degrees N latitude; 314 degrees longitude.
Magnetic declination (1975): 12.1 degrees E.
Local strength of earth's magnetic field: horizontal component 24.7 uT; vertical component 45.8 uT; Total 52.1 uT.
Magnetic dip angle: 61.7 degrees.
Here is a chart of meteorological data, dating from 1964.
(Click on the image for a larger view.)