Get to know Ephemeris better with 10+ real example sentences, the meaning and synonyms like annual or yearly.
Ephemeris in a sentence
Ephemeris meaning
- A journal or diary.
- A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination.
- Computer software that calculates the apparent position of celestial bodies.
Using Ephemeris
- The main meaning on this page is: A journal or diary. | A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination. | Computer software that calculates the apparent position of celestial bodies.
- Useful related words include: annual, yearly, yearbook.
- In the example corpus, ephemeris often appears in combinations such as: ephemeris time, the ephemeris, ephemeris and.
Context around Ephemeris
- Average sentence length in these examples: 22.6 words
- Position in the sentence: 3 start, 12 middle, 5 end
- Sentence types: 20 statements, 0 questions, 0 exclamations
Corpus analysis for Ephemeris
- In this selection, "ephemeris" usually appears in the middle of the sentence. The average example has 22.6 words, and this corpus slice is mostly made up of statements.
- Around the word, astronomical, american, 1952, seconds, errors and allow stand out and add context to how "ephemeris" is used.
- Recognizable usage signals include definition of ephemeris time 1952 and the american ephemeris and nautical. That gives this page its own corpus information beyond isolated example sentences.
- By corpus frequency, "ephemeris" sits close to words such as abhiyan, ajibola and ajinkya, which helps place it inside the broader word index.
Example types with ephemeris
The same corpus examples are grouped by length and sentence type, making it easier to see the contexts in which the word appears:
Among them is the DE405 ephemeris in widespread current use. (10 words)
Atmospheric delay and satellite ephemeris errors have been significantly reduced. (10 words)
The offset provided a continuity from Ephemeris Time to TDT. (10 words)
The time scale represented by T eph is closely related to, but distinct (by an offset and constant rate) from, the TCB time scale currently adopted as a standard by the IAU (see below: JPL ephemeris time argument Teph). (39 words)
Increasingly, after the calibration in 1958 of the cesium atomic clock by reference to ephemeris time, cesium atomic clocks running on the basis of ephemeris seconds began to be used and kept in step with ephemeris time. (37 words)
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). (33 words)
Example sentences (20)
Increasingly, after the calibration in 1958 of the cesium atomic clock by reference to ephemeris time, cesium atomic clocks running on the basis of ephemeris seconds began to be used and kept in step with ephemeris time.
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).
Explanatory Supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac, London: Her Majesty's Stationery Office. p. 410–11.
Nautical almanac offices of the United Kingdom and United States, Explanatory supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac (London: Her Majesty's Stationery Office, 1961), 413-6.
Although not an IAU standard, the ephemeris time argument T eph has been in use at that institution since the 1960s.
Among them is the DE405 ephemeris in widespread current use.
Atmospheric delay and satellite ephemeris errors have been significantly reduced.
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.
In view of the fluctuation term, practical determination of the difference between ephemeris time and UT depended on observation.
Most of the following sections relate to the ephemeris time of the 1952 standard.
Setting circles in conjunction with a star chart or ephemeris allow the telescope to be easily pointed at known objects on the celestial sphere.
Strings 1-4 provide immediate data for the transmitting satellite, and are repeated every frame; the data include ephemeris, clock and frequency offsets, and satellite status.
Terrestrial Time is a theoretical uniform time scale, defined to provide continuity with the former Ephemeris Time (ET).
The intent was to define a uniform time (as far as was then feasible) based on Newtonian theory (see below: Definition of ephemeris time (1952)).
The offset provided a continuity from Ephemeris Time to TDT.
There can be a delay of up to 30 seconds before the first estimate of position because of the need to read the ephemeris data.
The second and the third subframes contain the ephemeris – the precise orbit for the satellite.
These updates synchronize the atomic clocks on board the satellites to within a few nanoseconds of each other, and adjust the ephemeris of each satellite's internal orbital model.
The time scale represented by T eph is closely related to, but distinct (by an offset and constant rate) from, the TCB time scale currently adopted as a standard by the IAU (see below: JPL ephemeris time argument Teph).
This Ephemeris Time standard was non-relativistic and did not fulfil growing needs for relativistic coordinate time scales.
Common combinations with ephemeris
These word pairs occur most frequently in English texts: