Campbell Scientific WINDSONIC1 WINDSONIC 2-D Sonic Wind Sensors - Page 38

Appendix A., A-3.

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Appendix A. WindSonic Orientation Declination angles east of True North are considered negative, and are subtracted from 360 degrees to get True North as shown FIGURE A-2 (0° and 360° are the same point on a compass). Declination angles west of True North are considered positive, and are added to 0 degrees to get True North as shown in FIGURE A-3. For example, the declination for Longmont, CO (10 June 2006) is 9.67°, thus True North is 360° ─ 9.67°, or 350.33° as read on a compass. Likewise, the declination for McHenry, IL (10 June 2006) is ─2.68°, and True North is 0° ─ (─2.68°), or 2.68° as read on a compass. FIGURE A-2. A declination angle east of True North (positive) is subtracted from 360 (0) degrees to find True North FIGURE A-3. A declination angle west of True North (negative) is subtracted from 0 (360) degrees to find True North A-2

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Appendix A.
WindSonic Orientation
Declination angles east of True North are considered negative, and are
subtracted from 360 degrees to get True North as shown FIGURE A-2 (0° and
360° are the same point on a compass). Declination angles west of True North
are considered positive, and are added to 0 degrees to get True North as shown
in FIGURE A-3.
For example, the declination for Longmont, CO (10 June 2006) is 9.67
°
, thus
True North is 360
°
─
9.67
°
, or 350.33
°
as read on a compass.
Likewise, the
declination for McHenry, IL (10 June 2006) is
─
2.68
°
, and True North is
0
°
─
(
─
2.68
°
), or 2.68
°
as read on a compass.
FIGURE A-2.
A declination angle east of True North (positive) is
subtracted from 360 (0) degrees to find True North
FIGURE A-3.
A declination angle west of True North (negative) is
subtracted from 0 (360) degrees to find True North
A-2