LOS ANGELES (AP) - Call it space grave robbery for a
cause: Imagine scavenging defunct communication satellites for their
valuable parts and recycling them to build brand new ones for cheap.
It's the latest pet project from the Pentagon's research wing known
for its quirky and sometimes out-there ideas. The Defense Advanced
Research Projects Agency is spending $180 million to test technologies
that could make this possible.
When satellites retire, certain parts — such as antennas and solar
panels — often still work. There's currently no routine effort to
salvage and reuse satellite parts once they're launched into space.
DARPA thinks it can save money by repurposing in orbit.
"We're attempting to essentially increase the return on investment
... and try to find a way to really change the economics so that we can
lower the cost" of military space missions, said DARPA program manager
David Barnhart.
Work on DARPA's Phoenix program — named after the mythical bird that
rose from its own ashes — is already under way. The agency awarded
contracts to several companies to develop new technologies, and it is
seeking fresh proposals from interested parties next month.
A key test will come in 2016 when it launches a demonstration mission
that seeks to breathe new life to an antenna from a
yet-to-be-determined decommissioned satellite. DARPA has identified
about 140 retired satellites that it can choose from for its first test.
Here's the vision: Launch a robotic mechanic outfitted with a toolkit
that can rendezvous with defunct satellites and mine them for parts.
The plan also calls for the separate launch of mini-satellites. The
robotic mechanic would then string together the mini-satellites and old
satellite parts to create a new communication system.
It's like doing robotic surgery in zero gravity.
DARPA officials said one way to keep costs down is for the
mini-satellites to hitch a ride aboard available space on commercial
rockets.
Harvard astrophysicist Jonathan McDowell, who tracks the world's
space launches and satellites, called it "an interesting idea" that may
reduce costs in the long-term.
"The first few times you do this, it'll definitely be more expensive
than just building the new antenna on your satellite from scratch. But
in the long run, it might work out," he said in an email.
McDowell said the biggest challenge in the upcoming demo test is
separating the antenna from the retired satellite without breaking it
and then successfully integrating it with the mini-satellites.
DARPA is used to funding blue-sky research and a few projects are slowly becoming reality.
In 2011, it dangled seed money to jumpstart a way to rocket people to
a star within a century in what's known as the 100-year Starship
program.
Long before Google tested self-driving cars, DARPA sponsored a
robotic road race in which university-designed autonomous vehicles eyed
for the finish line without human help.
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