where:
at = Semi-major axis of the transfer orbit (m)
r1 = Radius of initial orbit (m)
r2 = Radius of final orbit (m)
- The initial and final orbits are circular.
- The transfer occurs between two concentric orbits around the same central body.
- The inital and final orbits are coplanaer.
- Impulses are instantaneous.
- The system is treated as a two-body problem.