Section 1. Preparation and Siting
1-5
Subtract declination from 360
°
Add declination to 0
°
22 E
18 E
16 E
14 E
12 E
10 E
8 E
6 E
4 E
2 E
0
2 W
4 W
6 W
8 W
10 W
14 W
12 W
16 W
18 W
20 W
20 E
FIGURE 1.4-1. Magnetic Declination for the Contiguous United States
1.4.1 Prompts from GEOMAG
GEOMAG is accessed by phone with a PC and telephone modem, and a
communications program such as GraphTerm (PC208 Software). GEOMAG
prompts the caller for site latitude, longitude, and elevation, which it uses to
determine the magnetic declination and annual change. The following
information, menu, and prompts are from GEOMAG:
GEOMAG is a user-friendly program that provides estimates of the
geomagnetic field elements, including declination and total field intensity,
based upon Magnetic Models. The program is accessible by modem.
Modem Access:
Modem settings: No parity, 8 data bits, and 1 stop bit (i.e., N81)
Telephone numbers:
Phone Number
Baud Rates
303-273-8672
2400
303-273-8673
1200
303-273-8678
1200
Upon carrier-signal detection, press Return once or twice.
If you are using one of the commercial numbers, the following prompts will
appear. Type the responses shown (followed by pressing RETURN):
GLDSV1>
c neis
[RETURN]
Username:
QED
[RETURN]
