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The North Star (polestar) is a conspicuous star in the northern hemisphere, located closest to the point toward which the axis of the earth is directed, thus roughly marking the location of the north celestial pole. A polestar has been used by navigators throughout recorded history for charting navigation routes and is still used for determining true azimuth and astronomic latitude. The positions of the celestial poles change as the earth's axis moves with the earth's processional motion, and as the north celestial pole assumes different positions relative to the constellations, different stars become the North Star. During the past 5000 years the line of direction of the North Pole has moved from the star Thuban, or Alpha Draconis, in the constellation Draco, to within one degree of the bright star Polaris in the constellation Ursa Minor, which is now the North Star.
 Research North Star
An altazimuth is an astronomical instrument similar to a theodolite, having a telescope so mounted that it can be turned round in a plane perpendicular to the horizon, while it and the graduated vertical circle connected can also be turned horizontally to any point of the compass above a graduated horizontal circle. The altazimuth can thus determine the altitude and azimuth of objects, hence the name.
Research Altazimuth
The azimuth of a heavenly body is the arc of the horizon comprehended between the meridian of the observer and a vertical circle passing through the centre of the body. The azimuth and altitude give the exact position of the body.
Research Azimuth
JAVA is an abbreviation for Jammer Azimuth Versus Amplitude
Research JAVA
MAPS is an abbreviation for Managerial Administrative Problem Solving
MAPS is an abbreviation for Measurement of Air Pollution from Satellites
MAPS is an abbreviation for Measurement of Atmospheric Pollutants from Space
MAPS is an abbreviation for Missile Application Propulsion Study
MAPS is an abbreviation for Modular Azimuth Position System
MAPS is an abbreviation for Multiple Application Pro-Fan Studies
MAPS is an abbreviation for Multispectral Active Passive Scanner
MAPS is an abbreviation for Mail Abuse Prevention System
Research MAPS
RAE is an abbreviation for Royal Aircraft Establishment
RAE is an abbreviation for Radio Astronomy Explorer
RAE is an abbreviation for Ranger Azimuth Elevation
Research RAE
AZ is an abbreviation for Azerbaijan
AZ is an abbreviation for Arizona
AZ is an abbreviation for Azimuth
Research AZ
AZ/EL is an abbreviation for Azimuth and Elevation
Research AZ/EL
AZSCAN is an abbreviation for Azimuth Frequency Scan Radar
Research AZSCAN
Z is an abbreviation for Zenith
Z is an abbreviation for Zero
Z is an abbreviation for Zulu
Z is an abbreviation for Azimuth
Z is an abbreviation for Zone
Z is an abbreviation for Impedance
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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Abbreviations
