These space foragers are part of DARPA's Phoenix project, a program that would "harvest and re-use valuable components from retired, non-working satellites in GEO and demonstrate the ability to create new space systems at greatly reduced cost."
These satellites would scavenge communication satellites in geosynchronous orbit about 35,000km above Earth's surface. According to DARPA, dead communication satellites "still have usable antennas, solar arrays and other components which are expected to last much longer than the life of the satellite." Currently, once they die, they just become space trash. So, instead of launching a new satellite to replace the dead bodies, DARPA wants these orbital scavengers to turn them into communication probes for the military.
The Phoenix satellites would be able to either open the dead spacecraft and use some of its components or just leech on them, using systems like its parabolic antennas and solar panels.
They also want to create a payload orbital delivery system (PODS) that will transport these small space leeches to orbit on board a rocket. The PODS will deploy the satellites and remain in orbit. Once the satellites are done, the PODS will grab them back using robotic arms.
Perhaps Phoenix will end in DARPA's ever-expanding brown paper bag of failed projects. After all, one of the companies that just got a multimillion dollar contract to develop these concepts makes space systems plus edutainment software and furniture. Clearly, they are not Lockheed Martin or Boeing.
But if it works it will be great news for space. There's a lot of crap up there doing nada. Anything that avoids sending another satellite the size of a car will be good news. [Darpa via Parabolicarc]