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Noon at the local meridian

Related Terms

LOCAL MERIDIAN

The meridian through any particular place of observer, serving as the reference for local time, in contrast with GREEN- WICH MERIDIAN.

LOCAL TIME

1. Time based upon the local meridian as reference, as contrasted with that based upon a standard meridian. Local time was in general use in the United States until 1883, when standard time was adopted. 2. Any time kept locally.

GRID NORTH

1. An arbitrary reference direction used with grid navigation. The direction of the 180th geographical meridian from the north pole is used almost universally as grid north. 2. The northerly or zero direction indicated by the grid datum of directional reference.

HOUR CIRCLE

On the celestial sphere, a great circle through the celestial poles. An hour circle through the zenith is called a celestial meridian Also called CIRCLE OF DECLINATION, CIRCLE OF

HOUR ANGLE

Angular distance west of a celestial meridian or hour circle; the arc of the celestial equator, or the angle at the celestial pole, between the upper branch of a celestial meridian or hour circle and the hour circl

LONGITUDE

The distance in degrees east or west of the meridian at Greenwich, England.

LHA

Angular distance west of the local celestial meridian; the arc of the celestial equator, or the angle at the celestial pole, between the upper branch of the local celestial meridian and the hour circle of a point on th

LOCAL MERIDIAN

The meridian through any particular place of observer, serving as the reference for local time, in contrast with GREEN- WICH MERIDIAN.

VARIATION

The angular difference between the magnetic meridian and the geographic meridian at a particular location.

LOCAL HOUR ANGLE

Angular distance west of the local celestial meridian; the arc of the celestial equator, or the angle at the celestial pole, between the upper branch of the local celestial meridian and the hour circle of

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