DARPA's new spy satellite could provide real-time video from anywhere on EarthDecember 21, 2011 By Nancy Atkinson, Universe Today in Astronomy & Space / Space Exploration
It sees you when youre sleeping and knows when youre awake could be the theme song for a new spy satellite being developed by DARPA. The Defense Advanced Research Projects Agencys latest proof-of-concept project is called the Membrane Optical Imager for Real-Time Exploitation (MOIRE), and would provide real-time images and video of any place on Earth at any time a capability that, so far, only exists in the realm of movies and science fiction. The details of this huge eye-in-the-sky look like something right out of science fiction, as well, and it would be interesting to determine if it could have applications for astronomy as well.
MOIRE would be a geosynchronous orbital system that uses a huge but lightweight membrane optic. A 20-meter-wide membrane eye would be etched with a diffractive pattern, according to DARPA, which would focus light on a sensor. Reportedly it will cost $500 million USD for each space-based telescope, and it would be able to image an area greater than 100 x 100 km with a video update rate of at least one frame a second.
DARPA says the program aims to demonstrate the ability to manufacture large membranes and large structures to hold the optics flat, and also demonstrate the secondary optical elements needed to turn a diffraction-based optic into a wide bandwidth imaging device.
The MOIRE program began in March 2010 is now in the first phase of development, where DARPA is testing the concepts viability. Phase 2 would entail system design, with Ball Aerospace doing the design and building to test a 16-foot (5 m) telescope, and an option for a Phase 3 which would include a demonstration of the system, launching a 32-foot (10 m) telescope for flight tests in orbit.
The 20 meter (66 ft) design is quite a bit larger than NASAs next-generation James Webb Space Telescope that has an aperture of 21 feet (6.5 m).
Public Intelligence reports that such a telescope should be able to spot missile launcher vehicles moving at speeds of up to 60 mph on the ground, according to a DARPA contract. That would also require the image resolution to see objects less than 10 feet (3 m) long within a single image pixel.
Can we order one for looking for extrasolar planets?
Read more about the MOIRE on DARPAs website.
Source: Universe Today
"DARPA's new spy satellite could provide real-time video from anywhere on Earth" December 21, 2011 http://phys.org/news/2011-12-darpa-spy-satellite-real-time-video.html