The SPHERES Guest Scientist Program: collaborative science on the ISS

The SPHERES Guest Scientist Program (GSP) supports the efforts of geographically distributed researchers at MIT, the U.S. Department of Defense, NASA, and elsewhere, in the development of algorithms for the SPHERES formation-flying and docking testbed. The GSP consists of a test development framework, a robust and flexible interface to the SPHERES flight software, a portable high-fidelity simulation, two laboratory testbeds, and data analysis utilities. The SPHERES testbed will be operated in bi-weekly test sessions on-board the International Space Station. Updates to the flight software can be uploaded immediately prior to each test session, allowing guest scientists the opportunity to revise and improve their algorithms from one session to the next. The SPHERES flight software architecture and the GSP interface design contribute to the flexibility of the testbed, and minimize nonproductive labor by simplifying algorithm implementation.