Campbell Scientific WINDSONIC1 WINDSONIC 2-D Sonic Wind Sensors - Page 37

Appendix A. WindSonic Orientation, A.1 Determining True North and Sensor Orientation

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Appendix A. WindSonic Orientation A.1 Determining True North and Sensor Orientation The orientation of the WindSonic "North Arrow Markers" 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 (Section A.2). A general map showing magnetic declination for the Conterminous United States in 2004 is shown in FIGURE A-1. FIGURE A-1. Magnetic declination for the conterminous United States (2004) A-1

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Appendix A. WindSonic Orientation
A.1 Determining True North and Sensor Orientation
The orientation of the WindSonic “North Arrow Markers” 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 (Section A.2).
A general map showing magnetic declination for the
Conterminous United States in 2004 is shown in FIGURE A-1.
FIGURE A-1.
Magnetic declination for the conterminous United States
(2004)
A-1