Campbell-scientific RAWS-P Remote Automated Weather Station Manuel d'utilisateur télécharger pdf (Page 30)

RAWS-P Remote Automated Weather Station

in FIGURE 9-3. Note that when a negative number is subtracted from a

positive number, the resulting arithmetic operation is addition.

For example, the declination for Longmont, CO is 10.1°, thus True North is

360° ─ 10.1°, or 349.9° as read on a compass. Likewise, the declination for

Mc Henry, IL is ─2.6°, and True North is 0° ─ (─2.6°), or 2.6° as read on a

compass.

FIGURE 9-1. Magnetic declination for the contiguous United States

1 2 ... 25 26 27 28 29 30 31 32 33 34

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Campbell-scientific RAWS-P Remote Automated Weather Station Manuel d'utilisateur Page 30