Electric power and propulsion: The future

Electric propulsion and power are synergistic technologies that will be critical to the performance of a broad range of future space missions. Presently, power and propulsion are the dominant mass drivers on most spacecraft. It is anticipated that this condition will remain in the coming age of smaller spacecraft. Trends toward longer spacecraft life and the use of smaller, more cost effective launch vehicles will put further pressure on these critical bus technologies. The advantages of high performance on-board power and propulsion systems are widely recognized and development efforts are being pursued globally. NASA recognizes the need for advanced power and propulsion systems and NASA`s Office of Space Access and Technology (OSAT) maintains an aggressive, integrated power and propulsion program focused on preserving and furthering US leadership in space science and technology. This paper provides a description of anticipated needs and requirements for future commercial and government missions. In addition, it provides an overview of the OSAT sponsored program that is directed toward the development of critical technologies necessary to meet mission performance requirements both in the near term and into the next century.