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单词 delta-v
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Examples ofdelta-v

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To correct for this orbital perturbation, regular orbital stationkeeping manoeuvres are necessary, amounting to adelta-vof approximately 50 m/s per year.
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Over a time "t" the change in speed of the spacecraft is ("a" - "g") "t", whereas thedelta-vexpended is "at".
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A rocket stage, while carrying a given load, is capable of giving a particulardelta-v.
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Currently, 2-4 stages are needed to achieve the requireddelta-v.
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For low exhaust velocity with respect to the missiondelta-v, enormous amounts of reaction mass is needed.
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The velocity of the vehicle needs substantial burns at the intersection of the two orbital planes and thedelta-vis usually extremely high.
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In this case a gravity turn is not the optimal entry trajectory but it does allow for approximation of the truedelta-vrequired.
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In astrodynamics, this energy expenditure is defined by the net change in the spacecraft's velocity, ordelta-v.
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It is also notable for having a lowdelta-vrequirement for rendezvous.
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It is typical to combine the effects of these and other effects into an effective missiondelta-v.
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Thedelta-vto make the necessary plane change is typically extremely high.
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The actual acceleration of the craft is "a" - "g" and it is usingdelta-vat a rate of "a" per unit time.
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The early business model for these services is primarily in near-geosynchronous orbit, although largedelta-vorbital maneuvering services are also envisioned.
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To reach low earth orbit of the space station of 300 km, thedelta-vis over six times higher about 9.4 km/s.
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To reach orbit, the rocket must impart to the payload adelta-vof about 9.310 km/s.
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Orbital speed is slower for higher orbits, but attaining them requires higherdelta-v.
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Thus, the effectivedelta-vrequirement for these vehicles are reduced.
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Also, the equation strictly applies only to a theoretical impulsive maneuver, in which the propellant is discharged anddelta-vapplied instantaneously.
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Thedelta-vneeded to achieve low earth orbit starts around 9.4 km/s.
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The correction of this effect requires orbit control manoeuvres with a maximumdelta-vof about 2 m/s per year, depending on the desired longitude.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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更新时间：2025/11/4 7:36:59