A NASA-sponsored Demonstration of Autonomous Rendezvous Technology (DART)
program is progressing to an in-space experiment later this year.
DART is to shake-out the hardware needed for a spacecraft to locate and rendezvous with another spacecraft without direct human guidance. That ability is central to future space initiatives, such as Mars sample return, crew and cargo delivery to the International Space Station, satellite inspection, retrieval, and servicing missions.
The DART concept should also provide expertise in de-orbiting the Hubble Space Telescope. Current plans call for a rocket booster to robotically attach to the observatory. That motor would then ignite to precisely dump the observatory into a remote stretch of ocean here on Earth.
Orbital Sciences Corporation (OSC) of Dulles, Virginia is leading the DART effort. The work is contracted by NASA’s Space Launch Initiative (SLI) at Marshall Space Flight Center in Huntsville, Alabama.
To be powered into space by OSC’s Pegasus XL air-launched booster, the DART uses an Advanced Video Guidance Sensor to approach and circumnavigate a target satellite.
DART is now slated for a mid-October launch from the Vandenberg Air Force Base in California.
DART’s target is the 105-pound (48-kilogram), Orbital-built Multiple beam Beyond Line-of-sight Communications (MUBLCOM) satellite, launched back in 1999. The DART spacecraft is to pull up to the target under autonomous control, closing-in within 16 feet (5 meters) of the low Earth orbiting satellite.
Only the Russian Space Agency has developed and demonstrated an autonomous spacecraft rendezvous capability, OSC points out.
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