Delta-v budget

Delta-v budget (or velocity change budget) is a term used in astrodynamics and aerospace industry for velocity change (or delta-v) requirements for the various propulsive tasks and orbital maneuvers over phases of the space mission.

Sample delta-v budget will enumerate various classes of manoeuvres, delta-v per manoeuvre, number of manoeuvres required over the time of the mission.

Launch/landing budget

• Launch to LEO - this not only requires an increase of velocity from 0 to 7.8 km/s, but also typically 1.5-2 km/s for atmospheric drag and gravity drag
• Re-entry from LEO

Interplanetary budget

Manouvere from:	To:	Delta-v required
		[m/s]
Low Lunar Orbit	Lunar surface		1600
Earth escape orbit	Low Lunar Orbit		700
Geosynchronous Transfer Orbit	Earth escape orbit		700
Low Earth Orbit	Geosynchronous Transfer Orbit		2500
Earth surface	Low Earth Orbit		9700
Mars low-energy transfer orbit	Earth escape orbit		600
Mars low-energy transfer orbit	Mars capture orbit		900
Deimos transfer orbit	Phobos transfer orbit		300
Mars Escape Orbit	Deimos transfer orbit		200
Phobos transfer Orbit	Low Mars Orbit		900
Mars surface	Low Mars Orbit		4100
Deimos transfer orbit	Deimos surface		700
Phobos transfer orbit	Phobos surface		500

See also

Orbital taxing