New Telescope Spots Space Hazards for Military Satellites
Satellites that support U.S. military missions around the world can fall prey to collisions with space debris, space rocks or even enemy microsatellites. Now the Pentagon's DARPA has begun deploying new ground-based telescopes that can take wide-angle views of small deep-space objects and keep the space sentinels safe.
The innovative design of DARPA's telescope can provide the same space surveillance data "in a matter of nights" that existing telescopes require weeks or months to provide, according to Lt. Col. Travis Blake, DARPA's Space Surveillance Telescope (SST) program manager and an Air Force officer.
"Currently we have a 'soda straw' view of deep space, where we can only see one narrow segment of space at a time," Blake said. "The Space Surveillance Telescope should give us a much wider 'windshield' view of deep space objects, significantly enhancing our space situational awareness."
DARPA's telescope uses curved charge coupled device (CCD) technology similar to what exists in digital cameras . That helps create a compact size which helps the new telescope survey the sky more rapidly on its moveable mount it represents one of the most agile telescopes ever built for its size.
The telescope's CCD camera consists of curved imagers and a high-speed shutter that allows for both fast scans and high sensitivity. Such sensitivity helps the telescope detect and track the very small, very faint objects zipping across the wide-angle view of space.
Besides tracking possible satellite hazards, DARPA's telescope may also provide a new instrument for astronomical surveys of stars and comets. It collected its "first light" images earlier this year, and continues to undergo testing so that it can detect dim objects all on its own.
Ultimately, the new telescope aims to find more of the space objects in the geosynchronous region of space around the Earth's equator. That would allow the Pentagon to better keep track of collision dangers for its satellites at least until the expensive spacecraft get better shields .