Campbell CSAT3B, Instruction Manual, Page: 73 / 88

Appendix A. CSAT3B Orientation
A.1 Determining True North and Sensor Orientation
The orientation of the CSAT3B negative x-axis is found by reading a magnetic
compass and applying the site-specific correction for magnetic declination;
where the magnetic declination is the number of degrees between True North
and Magnetic North. Magnetic declination for a specific site can be obtained
from a USGS map, local airport, or through a NOAA web calculator
(Appendix A.2, Online Magnetic Declination Calculator ). A general map in
FIGURE A-1 taken from
www.ngdc.noaa.gov/geomag/img/DeclinationMap_US.png shows magnetic
declination for the conterminous United States in 2010.
FIGURE A-1. Magnetic declination for the conterminous United States
(2010)
A-1