Campbell Scientific UT10 10 foot Tower w/ Grounding Kit and Hinged Base - Manual (Page 58)

UT10 Weather Station
FIGURE 8-31. Magnetic Declination for the Contiguous United States
8.5.17.2 National Geophysical Data Center Website
This website facilitates the task of determining magnetic declination for your
weather station. The website uses longitude and latitude to determine
declination. Customers located in the U.S. can find their site’s longitude and
latitude. For international customers, a link is provided to help them determine
their longitude and latitude.
48