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Pentagon Wants Robots to Build Spaceships at High-Orbiting Transport Hub
by Staff Writers
Moscow (Sputnik) Sep 16, 2015

A highly capable robotic arm is the principle mechanism to be used on a new space base.

Building, repairing, refueling, upgrading, and transporting the spacecraft of the future using a single orbiting base - sounds like sci-fi, right? Not anymore, as researchers with the Pentagon's R and D arm DARPA are looking to build a huge transportation hub at 36,000 kilometers above Earth.

Humanity has long dreamed of space bases, and have tried their hands at experimental spacecraft, with varying degrees of success. Now, the Defense Advanced Research Projects Agency, the Pentagon's incubator for defense tech, claims it's working on machinery that will allow for the construction of transportation hubs in geosynchronous orbit (GEO), around 36,000 kilometers (22,370 miles) over our planet's surface.

A highly capable robotic arm is the principle mechanism to be used on such a new space base, and DARPA's got it well in hand, according to former NASA astronaut Pam Melroy, now deputy director of DARPA's Tactical Technology Office.

"We think that these capabilities - space capabilities - are not just about a single monolithic satellite with a few capabilities, but instead about a vibrant, robust ecosystem that involves transportation, repair, refueling, upgrading, [and] in situ construction," Melroy said Thursday at DARPA's "Wait, What? A Future Technology Forum" in St. Louis, reported.

"Look at the great seafaring port cities in the world for inspiration, and imagine a port of call at 36,000 kilometers," she added.

Low-Earth orbit, where most satellites and the International Space Station fly, situated between 186 and 373 miles (300 to 600 km) above Earth, is far less preferable than GEO for building a transformative transportation hub, Melroy noted. Here's why:

+ Lower velocity means reduced risk of collisions, especially with space junk;

+ Much more stable orbit, as atmospheric drag is almost non-present;

+ Objects stay in GEO, while they tend to fall from low-Earth orbit within about 25 years.

As space radiation levels so far away from Earth are too high for astronauts' long-term exposure, the hub will be necessarily operated by robots, Melroy explained.

But no need for humanoid robots complete with arms and legs to live on the base and keep it functioning - just a piece of a robot is sufficient. A strong one.

The Pentagon wants to use "robotic arms very much like the one that was used to build the International Space Station, but with greater levels of automation and safety. DARPA is building just such a robotic arm," Melroy was quoted as saying by

"We think this is a critical capability to building a transportation hub that allows transportation to and from the Earth's surface, from low-Earth orbit to GEO, and even beyond Earth orbit," Melroy said.

While the Pentagon is hard at work building robotic arms, the question of what, exactly, they intend to install on the station and transfer through it remains unknown.

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