Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. 24/7 Space News .




SPACE SCOPES
ATK Delivers Backbone of NASA's JWST
by Staff Writers
Arlington VA (SPX) Aug 23, 2013


The PMBSS will also meet unprecedented thermal stability requirements to minimize thermal distortion. While the telescope is operating at a range of extremely cold temperatures, from -406 to -343 degrees Fahrenheit, the backplane must not vary more than 38 nanometers (approximately 1/1,000th the diameter of a human hair). For reference, if the mirror were enlarged to span from Los Angeles to New York City, the tolerance for error would be less than 1 inch.

ATK (ATK) has shipped the primary mirror backplane support structure (PMBSS) for NASA's James Webb Space Telescope to Marshall Space Flight Center, completing an important milestone for the most powerful space telescope ever to be built.

The highly engineered PMBSS is the backbone of the telescope, supporting the telescope's beryllium mirrors, instruments and other elements. It also holds the 18-segment, 21-foot-diameter primary mirror nearly motionless while the telescope is peering into deep space. ATK built the PMBSS on time and within budget at its facility in Magna, Utah, under a contract with prime contractor Northrop Grumman Corporation (NOC).

"With this shipment, ATK has fulfilled a critical milestone for the program," said Scott Texter, Webb Optical Telescope Element manager for Northrop Grumman.

Measuring approximately 24 ft. tall by 19.5 ft. wide by more than 11 ft. deep when fully deployed, and weighing only 2,180 lbs., the PMBSS supports the mission payload and instruments weighing more than three times its own weight. The folding design of the PMBSS enables the telescope to fit inside the 15-foot-diameter fairing of the launch vehicle.

ATK designed, engineered and constructed more than 10,000 parts of the PMBSS using lightweight graphite materials, state-of-the-art material sciences and advanced fabrication techniques. The composite parts attach in many cases to precision metallic fittings, made of precision materials such as invar and titanium that provide interfaces with other elements of the observatory.

"ATK has enjoyed teaming with NASA and Northrop Grumman on the Webb Telescope program," said David Shanahan, vice president and general manager of ATK's Space Components division. "We are proud to know that the technologies and inventions we developed to enable this NASA flagship mission will benefit science and engineering for generations to come."

The PMBSS will also meet unprecedented thermal stability requirements to minimize thermal distortion. While the telescope is operating at a range of extremely cold temperatures, from -406 to -343 degrees Fahrenheit, the backplane must not vary more than 38 nanometers (approximately 1/1,000th the diameter of a human hair). For reference, if the mirror were enlarged to span from Los Angeles to New York City, the tolerance for error would be less than 1 inch.

Upon arrival at Marshall Space Flight Center, the PMBSS will undergo extreme cryogenic thermal testing. The PMBSS will then undergo structural static testing at Northrop Grumman's facilities in Redondo Beach, Calif., in early 2014 before NASA and Northrop Grumman ready the observatory for its 2018 launch.

The James Webb Space Telescope is the world's next-generation space observatory and successor to the Hubble Space Telescope. A joint project of NASA, the European Space Agency and the Canadian Space Agency, the Webb Telescope will observe the most distant objects in the universe, provide images of the first galaxies formed and see unexplored planets around distant stars.

.


Related Links
ATK
James Webb Space Telescope
Space Telescope News and Technology at Skynightly.com






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





SPACE SCOPES
U.S. astronomers prepare to pour glass for giant telescope mirror
Phoenix (UPI) Aug 26, 2013
A furnace in Arizona is melting glass to pour a 27-foot mirror for a giant telescope with 10 times the resolution of the Hubble Space Telescope, scientists say. The mirror, destined for the Giant Magellan Telescope to go into operation in Chile's Atacama Desert by 2022, will take a full year to polish to within 1/20 the wavelength of light, a tolerance on the scale of about 1 in 10 bill ... read more


SPACE SCOPES
NASA Prepares for First Virginia Coast Launch to Moon

NASA Selects Launch Services Contract for OSIRIS-REx Mission

Environmental Controls Move Beyond Earth

Bad night's sleep? The moon could be to blame

SPACE SCOPES
ASA Mars Rover Views Eclipse of the Sun by Phobos

International Space Agencies Outline Steps to Take Humans to Mars

Snapping Pictures of the Martian Moons

Mars Rover Opportunity Working at Edge of 'Solander'

SPACE SCOPES
NASA awards nearly $1.5B in support contracts

NSBRI and NASA Reduce Space Radiation Risks by Soliciting for Center of Space Radiation Research

Next Generation of Explorers Takes the Stage

Has Voyager 1 Left The Solar System?

SPACE SCOPES
China launches three experimental satellites

Medical quarantine over for Shenzhou-10 astronauts

China's astronauts ready for longer missions

Chinese probe reaches record height in space travel

SPACE SCOPES
Cosmonauts Complete Spacewalk, Unfold Russian Flag in Space

Italian astronaut recounts spacewalk drowning terror

ISS Boosting Biological Research in Orbit

Japanese Cargo Craft Captured, Berthed to ISS

SPACE SCOPES
Arianespace Launches EUTELSAT 25B/Es'hail 1 and GSAT 7

NASA Explores New Uses for Historic Launch Structures

Telemetry data confirms launch of South Korean satellite

ISRO pins hopes on GSLV-D5

SPACE SCOPES
Waking up to a new year

Study: Planets might be 'born free' without a parent star

Distant planet sets speed record by orbiting its star every 8.5 hours

Kepler planet hunter spacecraft is beyond repair: NASA

SPACE SCOPES
Creating a Secure, Private Internet and Cloud at the Tactical Edge

Sticking power of plant polyphenols used in new coatings

First Report of Real-Time Manipulation and Control of Nuclear Spin Noise

Lab-made complexes are "sun sponges"




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement