Campbell Scientific UT20 and UT30 Tower-based Weather Stations - Manual (Page 65)

UT20 and UT30 Tower-based Weather Stations
8.5.18.2 National Geophysical Data Center Web Site
This web site facilitates the task of determining magnetic declination for your
weather station. The web site uses longitude and latitude to determine
declination. Customers located in the US can find their site’s longitude and
latitude. For international customers, a link is provided to help them determine
their longitude and latitude.
FIGURE 8-34. Declination angles east of True North are
subtracted from 360 to get True North
FIGURE 8-35. Declination angles west of True North are
added to 0 to get True North
55