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James Webb Space Telescope
(mirror size comparison vs. Hubble below....)
Space.com article....
Mirror vs. Mirror
(mirror size comparison vs. Hubble below....)
Space.com article....
NASA's Next Great Observatory Gets SpaceWire Boost
NASA's James Webb Space Telescope is getting a broadband upgrade with "SpaceWire" that will allow the new orbital observatory to capture images of the universe in unprecedented detail once it launches in 2013.
Engineers at the NASA Goddard Space Flight Center in Greenbelt, Maryland, took SpaceWire, originally developed by the European Space Agency, and adapted it for easier implementation on space missions. They designed a small, low power microchip that can send SpaceWire signals at speeds over 200 megabits per second, or over ten times faster than most high definition television broadcasts.
The boost in speed makes information processing faster among the James Webb Space Telescope's (JWST) four science instruments as they "talk" to each other with the SpaceWire network. That means the infrared telescope, NASA's next great observatory, should capture larger and higher resolution images of space.
"It makes the scientists happy, and makes the observatory more efficient because it can cover a large swath of sky faster," said Pam Sullivan, manager of the JWST Integrated Science Instrument Module. She called $4.5-billion JWST "the next generation space telescope" and "successor to Hubble" that will look back 13 billion years to understand the origins of the universe.
JWST acts "like a digital camera" that turns light into digital data, according to Sullivan. The telescope will make use of 66 million detector pixels – the most on any infrared space telescope – that each collects a small bit of information. The science instruments can then process the information through SpaceWire to make a complete image, like creating an overall Impressionist painting from many tiny dots or pixels
"The trend is for telescopes to have more and more detector pixels to take bigger pictures of sky," observed Sullivan. She added that SpaceWire enables larger telescopes because "more pixels generate more data, and you have to have way to move more data around."
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NASA's James Webb Space Telescope is getting a broadband upgrade with "SpaceWire" that will allow the new orbital observatory to capture images of the universe in unprecedented detail once it launches in 2013.
Engineers at the NASA Goddard Space Flight Center in Greenbelt, Maryland, took SpaceWire, originally developed by the European Space Agency, and adapted it for easier implementation on space missions. They designed a small, low power microchip that can send SpaceWire signals at speeds over 200 megabits per second, or over ten times faster than most high definition television broadcasts.
The boost in speed makes information processing faster among the James Webb Space Telescope's (JWST) four science instruments as they "talk" to each other with the SpaceWire network. That means the infrared telescope, NASA's next great observatory, should capture larger and higher resolution images of space.
"It makes the scientists happy, and makes the observatory more efficient because it can cover a large swath of sky faster," said Pam Sullivan, manager of the JWST Integrated Science Instrument Module. She called $4.5-billion JWST "the next generation space telescope" and "successor to Hubble" that will look back 13 billion years to understand the origins of the universe.
JWST acts "like a digital camera" that turns light into digital data, according to Sullivan. The telescope will make use of 66 million detector pixels – the most on any infrared space telescope – that each collects a small bit of information. The science instruments can then process the information through SpaceWire to make a complete image, like creating an overall Impressionist painting from many tiny dots or pixels
"The trend is for telescopes to have more and more detector pixels to take bigger pictures of sky," observed Sullivan. She added that SpaceWire enables larger telescopes because "more pixels generate more data, and you have to have way to move more data around."
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) which is to use several engines (Merlin 3) as powerful as the Saturn V's...about 1.5 million lb/f of thrust each. 
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