almanac

Orbit information for all the satellites, including clock correction, and atmospheric delay parameters. This data is used to facilitate rapid SV acquisition. The orbit information is a subset of the ephemeris data with reduced accuracy. Information on the entire GPS constellation is transmitted by each GPS satellite.

Al"ma*nac n. [LL. almanac, almanach: cf. F. almanach, Sp. almanaque, It. almanacco, all of uncertain origin.]

A book or table, containing a calendar of days, and months, to which astronomical data and various statistics are often added, such as the times of the rising and setting of the sun and moon, eclipses, hours of full tide, stated festivals of churches, terms of courts, etc.

Nautical almanac, an almanac, or year book, containing astronomical calculations (lunar, stellar, etc.), and other information useful to mariners.

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© Webster 1913.