Do General Investigators have to collaborate with instrument PIs, or SOFIA scientists?
General Investigators (GIs) do not have to enter into collaboration with either SOFIA scientists or instrument PIs when using Facility-class Science Instruments (FSIs) and Principal Investigator-class Science Instruments (PSIs). However, Special Purpose Principal Investigator-class Science Instruments (SSIs) designed for particular sets of observations will have restricted availability. Interested GIs would need to contact the instrument team and partner with them, at their discretion.