This paper focuses on FDIR (Fault Detection, Isolation and Recovery) strategies for autonomous satellite formations. Anomalies that impact the formation geometry, the scientific mission and communications are considered. Three centralised, one mixed and two distributed strategies are characterised in terms of knowledge, algorithm and communication requirements. Preliminary Petri net - based simulations allow the dynamics of the spacecraft states and the FDIR task progress to be shown and the spacecraft communication links to be displayed. First results on the robustness of the strategies wrt an anomaly that would affect the FDIR itself or the communication links are presented.