Get to know Geoid better with 10+ real example sentences, the meaning.
Geoid meaning
The shape, extending through landmasses (continents, etc.), that the surface of the oceans of the Earth would take under the influence of the Earth's gravity and rotation alone, disregarding other factors such as winds and tides; that is, a surface of constant gravitational potential at zero elevation.
Using Geoid
- The main meaning on this page is: The shape, extending through landmasses (continents, etc.), that the surface of the oceans of the Earth would take under the influence of the Earth's gravity and rotation alone, disregarding other factors such as winds and tides; that is, a surface of constant gravitational potential at zero elevation.
- In the example corpus, geoid often appears in combinations such as: the geoid, geoid is.
Context around Geoid
- Average sentence length in these examples: 22.9 words
- Position in the sentence: 2 start, 7 middle, 5 end
- Sentence types: 14 statements, 0 questions, 0 exclamations
Corpus analysis for Geoid
- In this selection, "geoid" usually appears in the middle of the sentence. The average example has 22.9 words, and this corpus slice is mostly made up of statements.
- Around the word, theoretical, idealized, see, optimized, averages and uncertainty stand out and add context to how "geoid" is used.
- Recognizable usage signals include above the geoid or a and approximate the geoid by a. That gives this page its own corpus information beyond isolated example sentences.
- By corpus frequency, "geoid" sits close to words such as aaronson, abai and abass, which helps place it inside the broader word index.
Example types with geoid
The same corpus examples are grouped by length and sentence type, making it easier to see the contexts in which the word appears:
These geocentric ellipsoids are usually within 100m of the geoid. (10 words)
The second step is to approximate the geoid by a mathematically simpler reference surface. (14 words)
Geoid uncertainty casts doubt upon the accuracy claimed by both the 1999 and 2005 surveys. (15 words)
The TAI service, running since 1958, attempts to match the rate of proper time on the geoid, using an ensemble of atomic clocks spread over the surface and low orbital space of Earth. (33 words)
West programmed an IBM 7030 “Stretch” computer to deliver increasingly refined calculations for an extremely accurate geodetic Earth model, a geoid, optimized for what ultimately became the GPS, the website states. (31 words)
In effect it defined the geoid (mean sea level) in terms of a particular level of gravitational time dilation relative to a notional observer located at infinitely high altitude. (29 words)
Example sentences (14)
The reason why it differs from the normal to the geoid is, because the geoid is an idealized, theoretical shape "at mean sea level".
West programmed an IBM 7030 “Stretch” computer to deliver increasingly refined calculations for an extremely accurate geodetic Earth model, a geoid, optimized for what ultimately became the GPS, the website states.
Also, the true vertical at a point at a specific time is influenced by tidal forces, which the theoretical geoid averages out.
Geoid uncertainty casts doubt upon the accuracy claimed by both the 1999 and 2005 surveys.
In effect it defined the geoid (mean sea level) in terms of a particular level of gravitational time dilation relative to a notional observer located at infinitely high altitude.
In general the true vertical at a point on the surface does not exactly coincide with either the normal to the reference ellipsoid or the normal to the geoid.
Points on the real surface of the earth are usually above or below this idealized geoid surface and here the true vertical can vary slightly.
The comparison of the observer's clock against TT depends on the observer's altitude: they will match on the geoid, and clocks at higher altitude tick slightly faster.
The second step is to approximate the geoid by a mathematically simpler reference surface.
These geocentric ellipsoids are usually within 100m of the geoid.
The TAI service, running since 1958, attempts to match the rate of proper time on the geoid, using an ensemble of atomic clocks spread over the surface and low orbital space of Earth.
They are used in gravity surveys over large areas for establishing the figure of the geoid over these areas.
This height differs from the height above the geoid or a reference height such as that above mean sea level at a specified location.
This terminology is also used for such approximately spheroidal astronomical bodies as the planet Earth (see geoid ).
Common combinations with geoid
These word pairs occur most frequently in English texts:
- the geoid 10×
- geoid is 2×