Space Infrastructure Servicing

Space Infrastructure Servicing (SIS) is a spacecraft concept being developed by Canadian aerospace firm MDA to operate as a small-scale in-space refueling depot for communication satellites in geosynchronous orbit.

In June 2017, SSL (MDA's Palo Alto, California company) announced its first commercial customer, Luxembourg-based satellite owner / operator SES S.A.

Maxar acquired SSL, then in 2019, SSL abandoned the SSP project.

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