It depends on how advanced you make the Project. Given the time travel aspect, you can make some assumptions that would give you satellites. The Project could launch a large "satellite" that is mostly armor for a micro- or nano-satellite. The shell could protect it well and it would be able to wait until it gets a wake-up signal to release the satellite.
Nano-satellites can do communications, imaging, and more. So you do have options other than hiding a launch site. Though there are options there too.
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