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Saturday, October 22, 2011

German Aerospace Report on Satellite

german satellite
Failure of the satellite into the atmosphere, the German Aerospace Center Sunday morning. "There is no confirmation, if debris reaching the Earth's surface," it said.

Up to 30 pieces of space debris hitting land or water.

Europe, Africa and Australia appear Roentgen satellite path, the agency said Saturday night. It is not clear, the satellite into the atmosphere.

"The biggest single fragment may be the telescope's mirror, which is very heat-resistant, can weigh up to 1.7 tons," according to the German Aerospace Center.

"One person injured in the possibility of re-entry is very low, the agency said." Editor, management, tower kerma Malik told CNN on Saturday night, "there is no serious threat of contamination" from the satellite.

Debris may fall about 50 miles wide (width 80 km) satellites into Earth's path at 17,398 miles (28,000 km) and the rest of the atmosphere at high temperatures, the agency said.

Officials said the satellite's orbit extends to the north and south latitude 53 degrees.

NASA said the satellite - X-ray Observatory - no propulsion system so that officials can not perform a controlled re-entry spacecraft's mission in late 1999.

NASA said the satellite is in 351 km and 363 km above the surface of the elliptical orbit between, but in June, only about 203 miles high.

Launched in June 1990, ROSAT all-sky imaging scientists for the first time X-ray telescope found the source of all the celestial X-ray radiation emitted, including some not expected to do so, said the object of NASA.

Satellite the moon, comets, stars, X-ray binaries, neutron stars, supernovae and supernova remnants, interstellar medium, galaxies, active galactic nuclei, black holes, nebulae and cosmic X-ray background, the agency said.

The satellite's mission is to be for the past 18 months. However, ROSAT "proved a huge success, it provides the benefits of science, as long as is technically feasible to extend the mission, the German agency said."

The delegation was finally ended in 1998 when the star tracker failed and the sun cause irreversible damage. ROSAT is February 12, 1999 closed more than 8 1 / 2 years after launch, NASA said.

U.S. Department of Defense said that more than 21,800 man-made objects re-entering Earth's atmosphere, as man-made earth satellite, launched in 1957 by the Soviet Union the world's first artificial Earth satellite tracking began.

Last month, the surviving remnants of a NASA satellite re-input more than one remote southern Pacific stretch the Earth's atmosphere and broke up during re-entry into the film and 26 to the total weight that may have reached the surface, NASA 1,200 pounds of large, said. German scientists said the failure of the satellite into the atmosphere, but whether there is any pieces falling to the earth does not have any information.

Andreas Schuetz, German Aerospace Center spokesman said, there is no indication of which country or region ROSAT satellite has begun to collapse.

Experts are now waiting for "the views from around the world," Schuetz said. Most parts of the van the size of the satellite re-entry will be burned into the atmosphere, but as many as 30 may be weighing 1.7 tons of debris crashed into the Earth's speed of up to 450 km / hour.

Re-entry time and place can not be predicted accurately, "Aviation Space Center on its Web site said in a statement." ROSAT, extending to the north and south of latitude 53 degrees in various fields under the track, may affect their re-entry. "

Falling debris can be anywhere, in a 80 km wide across the earth-orbit satellites orbit over large tracts of land, but not likely to strike in Europe, the scientists calculated.

ROSAT largest single segment may hit the Earth's heat-mirror telescope.

During its mission, in 1990, satellites orbiting about 600 km above the Earth's surface, but since retiring in 1999, it has lost its height, hovering at a distance of only 330 km in June, the German Space Agency said.
satellite fail

Roentgen satellite, orbiting the earth every 90 minutes, was used to study black holes, neutron stars and the universe of X - ray radiation. It does not own propulsion system, which is why scientists have been unable to break into a controlled re-entry.

The German Space Agency, the chances of someone being hurt somewhere satellite earth in 2000 - slightly higher than the risk of decline last month, NASA's satellite digital. But the odds of knocking anyone one is 14 trillion, 70 billion people on Earth. Vehicle size is a German satellite is expected to re-enter Earth's atmosphere over the weekend, officials said Wednesday, they rarely know which of the fragments may land.

X-ray Observatory, the Roentgen satellite, expected in October 22 and 23 returned to Earth at about 28,000 kilometers (17,000 miles) per hour speed, the German Aerospace Center (DLR) said in a statement.

DLR's re-entry before October 20 and 25 between the banks, but said they can be a little more accurate satellite close.

However, the current space debris to reach the expected time before or after the two days, DLR said.

, "It said," This period of uncertainty will be reduced by the date of re-entry method.

According to latest estimates, up to 30, weighing 1.7 tons of a single piece can reach the Earth's surface.

"The biggest single fragment may be a mirror of the telescope, which is very heat-resistant, the center said."

However, statistically speaking, very few humans from dangerous space junk, the experts said. In the sea or on an uninhabited land fragmentation will almost certainly decline.

NASA said last month, a bus-sized satellite of the Earth U.S. unpredictable Zhuixiang Africa and North Atlantic before crossing the Pacific Ocean off California fell.

Six tons of Upper Atmosphere Research Satellite (UARS) fell from the sky without trace or damage to a reliable account.


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