本帖最后由 Fidodido 于 2011-9-25 15:03 编辑
原版请见NASA网站:http://www.nasa.gov/rss/uars_update.xml
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NASA's UARS Re-enters Earth's Atmosphere
NASA’s decommissioned Upper Atmosphere Research Satellite (UARS) fell back to Earth between 11:23 p.m. EDT Friday, Sept. 23 and 1:09 a.m. Sept. 24, 20 years and nine days after its launch on a 14-year mission that produced some of the first long-term records of chemicals in the atmosphere.
The precise re-entry time and location of debris impacts have not been determined. During the re-entry period, the satellite passed from the east coast of Africa over the Indian Ocean, then the Pacific Ocean, then across northern Canada, then across the northern Atlantic Ocean, to a point over West Africa. The vast majority of the orbital transit was over water, with some flight over northern Canada and West Africa.
Six years after the end of its productive scientific life, UARS broke into pieces during re-entry, and most of it up burned in the atmosphere. Data indicates the satellite likely broke apart and landed in the Pacific Ocean far off the U.S. coast. Twenty-six satellite components, weighing a total of about 1,200 pounds, could have survived the fiery re-entry and reach the surface of Earth. However, NASA is not aware of any reports of injury or property damage.
The Operations Center for JFCC-Space, the Joint Functional Component Command at Vandenberg Air Force Base, Calif., which works around the clock detecting, identifying and tracking all man-made objects in Earth orbit, tracked the movements of UARS through the satellite’s final orbits and provided confirmation of re-entry.
“We extend our appreciation to the Joint Space Operations Center for monitoring UARS not only this past week but also throughout its entire 20 years on orbit,” said Nick Johnson, NASA’s chief scientist for orbital debris, at NASA’s Johnson Space Center in Houston. “This was not an easy re-entry to predict because of the natural forces acting on the satellite as its orbit decayed. Space-faring nations around the world also were monitoring the satellite’s descent in the last two hours and all the predictions were well within the range estimated by JSpOC.”
UARS was launched Sept. 12, 1991, aboard space shuttle mission STS-48 and deployed on Sept. 15, 1991. It was the first multi-instrumented satellite to observe numerous chemical components of the atmosphere for better understanding of photochemistry. UARS data marked the beginning of many long-term records for key chemicals in the atmosphere. The satellite also provided key data on the amount of light that comes from the sun at ultraviolet and visible wavelengths. UARS ceased its scientific life in 2005.
Because of the satellite's orbit, any surviving components of UARS should have landed within a zone between 57 degrees north latitude and 57 degrees south latitude. It is impossible to pinpoint just where in that zone the debris landed, but NASA estimates the debris footprint to be about 500 miles long.
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不想翻译了,太累,能看懂的看,看不懂的通过字典看。
Update #16
NASA’s decommissioned Upper Atmosphere Research Satellite fell back to Earth between 11:23 p.m. EDT Friday, Sept. 23 and 1:09 a.m. EDT Sept. 24. The Joint Space Operations Center at Vandenberg Air Force Base in California said the satellite entered the atmosphere over the North Pacific Ocean, off the west coast of the United States. The precise re-entry time and location of any debris impacts are still being determined. NASA is not aware of any reports of injury or property damage.
This is your source for official information on the re-entry of UARS. All information posted here has been verified with a government agency or law enforcement.
NASA will conduct a media telecon at 2 p.m. ET to discuss the re-entry. The telecon will be streamed live at www.nasa.gov/newsaudio.
NASA的退役UARS卫星在美国东部时间9月23日晚上11点23分到9月24号凌晨1:09分坠落地球(北京时间24日11点23至下午1点09分)。加州位于范登堡空军基地的联合空间指挥中心说卫星是在穿过太平洋后坠入大气层,坠入在美国西海岸。精确的重入大气层时间和碎片对坠落地点的影响正在评估中。NASA没有接到任何关于人员财产损失的报告。
这是UARS坠落的官方消息的源头。在这里公布的所有的消息已经被government相关部门证实。
NASA将在下午2点(估计是美国东部时间)进行一个媒体电话回议。电话会议的实况可以通过www.nasa.gov/newsaudio观看。
Update #15
NASA’s decommissioned Upper Atmosphere Research Satellite fell back to Earth between 11:23 p.m. EDT Friday, Sept. 23 and 1:09 a.m. EDT Sept. 24. The Joint Space Operations Center at Vandenberg Air Force Base in California said the satellite penetrated the atmosphere over the Pacific Ocean. The precise re-entry time and location are not yet known with certainty.
NASA的退役UARS卫星在美国东部时间9月23日晚上11点23分到9月24号凌晨1:09分坠落地球(北京时间24日中午11点23至下午1点09分)。加州位于范登堡空军基地的联合空间指挥中心说卫星是在穿过太平洋后坠入大气层的。精确的重入大气层时间和地点现在还不能确切的知道。
Update #14
NASA’s decommissioned Upper Atmosphere Research Satellite fell back to Earth between 11:23 p.m. EDT Friday, Sept. 23 and 1:09 a.m. EDT Sept. 24. The satellite was passing eastward over Canada and Africa as well as vast portions of the Pacific, Atlantic and Indian oceans during that period. The precise re-entry time and location are not yet known with certainty.
NASA的退役UARS卫星在美国东部时间9月23日晚上11点23分到9月24号凌晨1:09分坠落地球(北京时间24日中午11点23至下午1点09分)。在这个过程中卫星正在向东经过加拿大,非州,及太平洋,大西洋和印度洋的广阔地带。精确的重入大气层时间和地点现在还不能确切的知道。
Update #13
As of 10:30 p.m. EDT on Sept. 23, 2011, the orbit of UARS was 85 miles by 90 miles (135 km by 140 km). Re-entry was expected between 11:45 p.m. Friday, Sept. 23, and 12:45 a.m., Sept. 24, Eastern Daylight Time (3:45 a.m. to 4:45 a.m. GMT). During that time period, the satellite was passing over Canada and Africa, as well as vast areas of the Pacific, Atlantic and Indian oceans. The risk to public safety was very remote. NASA is working to confirm the re-entry location and time and will provide an update shortly.
美国东部时间9月23日晚上10时30分,UARS的轨道高度大约在135KM一140KM之间。预计重入大气层坠落时间在美国东部时间23日晚上11点45分到12:45左右(北京时间24日中午11点45分到12点45分)。在这个时间里,卫星将通过加拿大,非洲,太平洋,大西洋,印度洋。坠落对于公众安全造成的的风险十分微小。NASA正为确认重入大气层的地点和时间而工作,将在不久后更新。
Update #12
As of 10:30 p.m. EDT on Sept. 23, 2011, the orbit of UARS was 85 miles by 90 miles (135 km by 140 km). Re-entry is expected between 11:45 p.m. Friday, Sept. 23, and 12:45 a.m., Sept. 24, Eastern Daylight Time (3:45 a.m. to 4:45 a.m. GMT). During that time period, the satellite will be passing over Canada and Africa, as well as vast areas of the Pacific, Atlantic and Indian oceans. The risk to public safety is very remote.
美国东部时间9月23日晚上10时30分,UARS的轨道高度大约在135KM一140KM之间。预计重入大气层坠落时间在美国东部时间23日晚上11点45分到12:45左右(北京时间24日中午11点45分到12点45分)。在这个时间里,卫星将通过加拿大,非洲,太平洋,大西洋,印度洋。坠落对于公众安全造成的的风险十分微小。
Update #11
As of 7 p.m. EDT on Sept. 23, 2011, the orbit of UARS was 90 miles by 95 miles (145 km by 150 km). Re-entry is expected between 11 p.m. Friday, Sept. 23, and 3 a.m., Sept. 24, Eastern Daylight Time (3 a.m. to 7 a.m. GMT). During that time period, the satellite will be passing over Canada, Africa and Australia, as well as vast areas of the Pacific, Atlantic and Indian oceans. The risk to public safety is very remote.
美国东部时间9月23日晚上7时,UARS的轨道高度大约在145KM一150KM之间。预计重入大气层坠落时间在美国东部时间23日晚上11点到24日早上3点左右(北京时间24日中午11点到下午3点左右)。在这个时间里,卫星将通过加拿大,非洲,澳洲,太平洋,大西洋,印度洋。
这是北京时间24日上午11:45左右的UARS的照片。
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