Also known as: RA#, RA...
RA has various meanings in the NASA category. Discover the full forms, definitions, and usage contexts of RA in NASA.
The amount of time that passes between the rising of Aries and another celestial object. Right ascension is one unit of measure for locating an object in the sky. Measurement of a heavenly body's distance from from First Point of Aries, and expressed in terms of sidereal time.
NASAAn onboard radar for determining the altitude of an aircraft above an underlying surface.
NASAThe price of a transport service. Quantity, amount or degree measured or applied. Old scale for classing of warships Based on number of guns carried; first rate carried 100 or more guns; fifth rate carried 32 to 40 Lowest rate was 'sixth'. Rate of a chronometer is the amount it gains or loses in 24 hrs
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