sharon sanders
Editor-in-Chief & President
FEBRUARY 12, 2009
Satellites Destroyed in Orbital Collision
By ANDY PASZTOR
A commercial satellite owned by a U.S. company was destroyed in a collision with a defunct Russian military satellite in what NASA said was the first such accident in orbit, raising new concerns about the dangers of space debris.
The crash, which happened Tuesday in low-earth orbit, involved one of the satellites owned by closely held Iridium Satellite LLC and a crippled Russian military satellite that apparently stopped functioning years ago, according to U.S. government and satellite-industry officials.
The collision created two large clouds of debris floating roughly 480 miles above Siberia, and prompted space scientists and engineers to assess the likelihood of further collisions.
The accident could have implications for U.S. space budgets and policy, partly because it comes amid a Pentagon campaign to increase spending on systems to protect U.S. high-tech space hardware by keeping better track of the thousands of pieces of debris and other satellites circling the Earth.
As more and more satellites are blasted into orbit, the challenges of keeping them from hitting debris or each other are growing. Military planners also worry about enemies jamming, disabling or potentially even ramming U.S. satellites.
Industry officials say Iridium has identified the Russian craft as a Cosmos series satellite launched in 1993, weighing more than a ton and including an onboard nuclear reactor. That couldn't be independently verified. Experts have said the chance of radioactive debris surviving a fall through the atmosphere and reaching inhabited areas is very small.
The Russian Embassy couldn't be reached for comment.
more......
http://online.wsj.com/article/SB123438921888374497.html
Satellites Destroyed in Orbital Collision
By ANDY PASZTOR
A commercial satellite owned by a U.S. company was destroyed in a collision with a defunct Russian military satellite in what NASA said was the first such accident in orbit, raising new concerns about the dangers of space debris.
The crash, which happened Tuesday in low-earth orbit, involved one of the satellites owned by closely held Iridium Satellite LLC and a crippled Russian military satellite that apparently stopped functioning years ago, according to U.S. government and satellite-industry officials.
The collision created two large clouds of debris floating roughly 480 miles above Siberia, and prompted space scientists and engineers to assess the likelihood of further collisions.
The accident could have implications for U.S. space budgets and policy, partly because it comes amid a Pentagon campaign to increase spending on systems to protect U.S. high-tech space hardware by keeping better track of the thousands of pieces of debris and other satellites circling the Earth.
As more and more satellites are blasted into orbit, the challenges of keeping them from hitting debris or each other are growing. Military planners also worry about enemies jamming, disabling or potentially even ramming U.S. satellites.
Industry officials say Iridium has identified the Russian craft as a Cosmos series satellite launched in 1993, weighing more than a ton and including an onboard nuclear reactor. That couldn't be independently verified. Experts have said the chance of radioactive debris surviving a fall through the atmosphere and reaching inhabited areas is very small.
The Russian Embassy couldn't be reached for comment.
more......
http://online.wsj.com/article/SB123438921888374497.html