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Section 1. Preparation and Siting
1-7
Exiting:
Press "Cntrl-Z" to exit GEOMAG.
When the main menu reappears either select another option or type "X" to
log out.
If you used one of the commercial numbers, the GLDSV1> prompt will
reappear.
Type "LO" to disconnect.
Use of GEOMAG is free (except for telephone charges). If possible, please
avoid using
GEOMAG between 9 a.m. and 4 p.m., mountain time, Monday through Friday.
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 1.4-1,
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 1.4-2. Declination Angles East of True North Are Subtracted
From 0 to Get True North