Campbell Scientific DCP100 GOES Data Collection Platform - Manual (Page 38)

APPENDIX G. LOCAL MAGNETIC DECLINATION
G-2
Options:
1 = Field Values (D, I, H, X, Z, F)
2 = Magnetic Pole Positions
3 = Dipole Axis and Magnitude
4 = Magnetic Center
[1] : 1
Display values twice [N]: press return
Name of field model [USCON90]: press
return
Date
[current date]: press
return
Latitude
: 42/2 N
Longitude : 111/51/2 W
Elevation : 4454
Units (m/km/ft) : ft
Example of report generated by GEOMAG:
Model: USCON90 Latitude: 42/2 N
Date : 7/27/93 Longitude: 111/51/2 W
Elevation: 4454.0 ft
D
deg min
15 59.6
Annual change:
0 -6.1
The declination in the example above is listed
as 15 degrees and 59.6 minutes. Expressed in
degrees, this would be 15.99 degrees. As
shown in Figure G-1, the declination for Utah is
east, so True North for this site is 360 - 15.99,
or 344 degrees. The annual change is -6.1
minutes.
FIGURE G-2. Declination Angles East
of True North
FIGURE G-3. Declination Angles West
of True North