Difference between revisions of "Magnetic Declination"
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Magnetic Declination
(symbol D, Missing Image:img src="SP7_m_files/deltasm.gif")
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In terrestrial
magnetism; at any given location, the angle between the geographical meridian and
the magnetic
meridian; that is, the angle between true north and magnetic north. Also
called declination , and in navigation, variation.
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Declination is either east or west according as the
compass needle points to the east or west of the geographical meridian. Lines
of constant declination are called isogonic lines and the one of zero
declination is called the agonic line. [[/a>|/a>
]]
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
