Magnetic declination | 合法醫療器材資訊網
Byconvention,declinationispositivewhenmagneticnorthiseastoftruenorth,andnegativewhenitistothewest.IsogoniclinesarelinesontheEarth'ssurface ...
Angle on the horizontal plane between magnetic north and true north
Example of magnetic declination showing a compass needle with a "positive" (or "easterly") variation from geographic north. Ng is geographic or true north, Nm is magnetic north, and δ is magnetic declination.Magnetic declination, or magnetic variation, is the angle on the horizontal plane between magnetic north (the direction the north end of a magnetized compass needle points, corresponding to the direction of the Earths magnetic field lines) and true north (the direction along a meridian towards the geographic North Pole). This angle varies depending on position on the Earths surface and changes over time.
Somewhat more formally, Bowditch defines variation as "the angle between the magnetic and geographic meridians at any place, expressed in degrees and minutes east or west to...
Explainer | 合法醫療器材資訊網
Magnetic Declination (Variation) | 合法醫療器材資訊網
Magnetic declination | 合法醫療器材資訊網
magnetic north | 合法醫療器材資訊網
Magnetic North vs Geographic (True) North Pole | 合法醫療器材資訊網
magnetic north 在英語中的意思 | 合法醫療器材資訊網
North magnetic pole | 合法醫療器材資訊網
The north magnetic pole just changed. Here's what that means. | 合法醫療器材資訊網
True north and magnetic north | 合法醫療器材資訊網
Why is Earth's magnetic north pole drifting so rapidly? | 合法醫療器材資訊網
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