Noun
A diary; a journal.
A publication giving the computed places of the heavenly bodies for each day of the year, with other numerical data, for the use of the astronomer and navigator; an astronomical almanac; as, the "American Ephemeris and Nautical Almanac."
Any tabular statement of the assigned places of a heavenly body, as a planet or comet, on several successive days.
A collective name for reviews, magazines, and all kinds of periodical literature.
Source: Webster's dictionarytoday computers calculate the ephemerides Source: Internet
Although not an IAU standard, the ephemeris time argument T eph has been in use at that institution since the 1960s. Source: Internet
Error sources include signal arrival time measurements, numerical calculations, atmospheric effects (ionospheric/tropospheric delays), ephemeris and clock data, multipath signals, and natural and artificial interference. Source: Internet
Among them is the DE405 ephemeris in widespread current use. Source: Internet
Atmospheric delay and satellite ephemeris errors have been significantly reduced. Source: Internet
Definition of ephemeris time (1952) Ephemeris time was defined in principle by the orbital motion of the Earth around the Sun, (but its practical implementation was usually achieved in another way, see below). Source: Internet