Glossary
Space Trajectories. Launch on Orbit

Orbital parameters

Geometric elements to locate a Keplerian orbit (two-body problem).

Staging

Breakdown of the launcher into several propulsion stages.

Indice constructif or structural; structural index

Ratio between the dry mass and the propellant mass of a stage.

Impulsion spécifique dans le vide; vacuum specific impulse

Ratio between empty thrust and weight flow (with g₀ = 9.80665 m/s²).

Pilotability

Ability to control angular movement.

Point constraint; interior point constraint

Constraint applied at a given date.

Contrainte d'état; state constraint

Stress applied to a flight sequence.