Life extension and orbit maneuvering strategies for small satellites in low Earth orbit using electrodynamic tethers

Thermospheric drag is an important force acting on orbiting satellites with altitudes of 300-600km (e.g. space shuttle operating altitudes). This drag reduces orbit lifetimes to typically <100 days. Electrodynamic tethers (EDTs) could provide one means of maintaining, boosting, and/or orbit maneuvering small satellites in low Earth orbit without the use of propellant over extended periods. An analysis is presented which looks at the use of EDTs on small satellites and for multiple orbital configurations. We will discuss strategies and tradeoffs for using EDTs for satellite orbit-hold, orbit boost and coast, and inclination change.