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ISS reboost today -- surprise!!! (?)
This caught me by surprise -- was there any advance description
that I missed? Russia's Mission Control starts increasing ISS orbit MOSCOW, February 22 21:21 (RIA Novosti) - Russia's Mission Control near Moscow said Wednesday it had started an operation to widen the International Space Station's orbit by about three kilometers. "By starting four [cargo vehicle Progress M-54] engines, which are to work for 793 seconds, the station will be given an impulse of 1.79 m per second, which we expect will raise the average orbital altitude of the ISS by approximately three kilometers," Mission Control said. The operation began outside the reach of Russian tracking systems, so the results will only be visible at 9.50 Moscow time (6.50 GMT), a Mission Control expert said. The orbit adjustment is needed to prepare the world's sole civilian space station for docking with the carrier rocket Soyuz TMA-8, which is to be launched from the Baikonur space station, which Russia leases from the Central Asian republic of Kazakhstan, on March 30. Soyuz will bring the next crew to the orbital station, with Brazil's first astronaut, who will spend a week at the ISS. Russian Mission Control's operation to widen ISS orbit complete MOSCOW, February 22 21:55 (RIA Novosti) - Russia's Mission Control near Moscow said Wednesday it had completed an operation to widen the International Space Station's orbit by about three kilometers. American tracking systems have registered the changes, a Mission Control expert said, adding that more precise information would be available by 9.50 Moscow time (6.50 GMT). The orbital adjustment was needed to prepare the world's sole civilian space station for docking with the carrier rocket Soyuz TMA-8, which is to be launched from the Baikonur space station which Russia leases from the Central Asian republic of Kazakhstan, on March 30. Soyuz will bring the next crew to the orbital station, with Brazil's first astronaut, who will spend a week at the ISS. To widen the ISS orbit, four engines of Russia's cargo vehicle Progress M-54 currently docked to the ISS were started at 20.50 Moscow time (5.50 GMT) Wednesday, and worked for the planned 793 seconds. Attempts to increase the station's orbit have not always been successful. For example, an operation to raise the ISS' average orbital altitude on October 19, 2005 failed when the cargo spaceship's engines stalled at the 170th second of the operation. As a result, the station's orbit was only elevated by 450 meters instead of the planned 10 km. The stalling was attributed to an electronic engine control system failure. Mission Control subsequently tested four of the spaceship's eight engines, before repeating the operation. Orbital adjustments are routine operations needed to prepare the orbital station for receiving Progress cargo ships and manned Soyuz vehicles. |
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ISS reboost today -- surprise!!! (?)
Jim Oberg wrote: This caught me by surprise -- was there any advance description that I missed? It was mentioned in the 'internal status reports' as posted on spaceref. see http://www.spaceref.com/news/viewsr.html?pid=19682 |
#3
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ISS reboost today -- surprise!!! (?)
Wow, good catch -- I hadn't scanned all the coming events lists that keep being issued because I didn't count on a change showing up there -- my methodology is flawed! From the Feb 17th report: 02/22/06 -- ISS reboost (by 19P; mnvr. back to XPOP after burn) "hop" wrote in message oups.com... Jim Oberg wrote: This caught me by surprise -- was there any advance description that I missed? It was mentioned in the 'internal status reports' as posted on spaceref. see http://www.spaceref.com/news/viewsr.html?pid=19682 |
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