That point at which a planet, planetoid, or comet crosses the ecliptic from south to north, or a satellite crosses the plane of the equator of its primary from south to north. Also called NORTHBOUND NODE. The opposite is called DESCENDING NODE
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SPREAD
The divergence of the air stream in a horizontal or vertical plane after it leaves the outlet.
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GUIANA CURRENT
An ocean current flowing northwestward along the northeast coast of South America. The Guiana Current is an extension of the Atlantic South Equatorial Current, which crosses the equator and approaches the coast of South America. Eventually, it is joined by part of the Atlantic North Equatorial Current and becomes, successively, the CARIBBEAN ISLANDS, and the FLORIDA CURRENT. Also called NORTH BRAZIL CURRENT.
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HORIZONTALLY POLARIZED WAVE
A plane polarized electromagnetic wave in which the electric field vector is in a horizontal plane.
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HEXAGON
A closed plane figure having six sides
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HORIZONTAL
Parallel to the plane of the horizon; perpendicular to the direction of gravity
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INCLINATION OF AN ORBIT
1. See INCLINATION, definition 2. 2. As defined by the International Telecommunication Union (ITU), the angle determined by the plane containing an orbit and the plane of th
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INCLINATION
1. The angle which a line or surface makes with the verti- cal, horizontal, or with another line or surface. 2. One of the orbital elements (parameters) that specifies the orientation of an orbit. It is the angle between the orbital plane and a reference plane, the plane of the celestial equator for geocentric orbits and the ecliptic for heliocentric orbits.
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INCLINATION
1. The angle which a line or surface makes with the verti- cal, horizontal, or with another line or surface. 2. One of the orbital elements (parameters) that specifies the orientation of an orbit. It is the angle between the orbital plane and a reference plane, the plane of the celestial equator for geocentric orbits and the ecliptic for heliocentric orbits.
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HYPOTENUSE
The side of a plane right triangle opposite the right angle; the longest side of a plane right triangle
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FACE AREA
The total plane area of the portion of a grille, coil, or other items bounded by a line tangent
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