What is Delta-v?

Delta-v is a scalar measure of the velocity change required to perform a spacecraft maneuver such as a launch, orbital insertion, course correction, or landing. It is the primary metric used in mission planning to determine propellant requirements, with the total mission delta-v budget setting the constraint on how much propellant a vehicle must carry.

How Delta-v Works in Sift

Delta-v budgets are validated through propulsion test data. Sift enables engineers to measure actual propulsive performance across test runs and compare against predicted delta-v values, closing the loop between simulation and real hardware.