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sci.geo.satellite-nav (Global Satellite Navigation) (sci.geo.satellite-nav) Discussion of global navigation satellite systems (GNSS). Topics include the technical aspects of GNSS operation, user experiences in the use of GNSS, information regarding GNSS products and discussion of GNSS policy (such as GPS selective availability).

Improper Fuel Line Installation Led to Incorrect Galileo Orbit



 
 
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  #1  
Old October 7th 14, 09:27 PM posted to sci.geo.satellite-nav
Sam Wormley[_2_]
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Posts: 775
Default Improper Fuel Line Installation Led to Incorrect Galileo Orbit

Improper Fuel Line Installation Led to Incorrect Galileo Orbit
http://gpsworld.com/improper-fuel-li...galileo-orbit/


The Euro-Russian inquiry board looking into the cause of the failure
has discovered that one in four Fregat upper stages at prime
contractor NPO Lavochkin in Moscow had the same fuel-line
installation, according to the reports. We have to assume that this
was a practice that had gone on in perhaps a quarter of the Fregat
stages produced in the past decade, but that it had not affected our
launches up to now because of mission-specific aspects like coast
time between burns, the number of burns and so on, which can
influence the effect of the helium on the hydrazine, one official is
quoted as saying. In any case, wed like Arianespace, which
currently has almost no inspection rights on the Soyuz, to be given
more say in quality assurance.


  #2  
Old October 8th 14, 09:35 AM posted to sci.geo.satellite-nav
J. J. Lodder
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Posts: 572
Default Improper Fuel Line Installation Led to Incorrect Galileo Orbit

Sam Wormley wrote:

Improper Fuel Line Installation Led to Incorrect Galileo Orbit
http://gpsworld.com/improper-fuel-li...orrect-galileo

-orbit/

The Euro-Russian inquiry board looking into the cause of the failure
has discovered that one in four Fregat upper stages at prime
contractor NPO Lavochkin in Moscow had the same fuel-line
installation, according to the reports. "We have to assume that this
was a practice that had gone on in perhaps a quarter of the Fregat
stages produced in the past decade, but that it had not affected our
launches up to now because of mission-specific aspects like coast
time between burns, the number of burns and so on, which can
influence the effect of the helium on the hydrazine," one official is
quoted as saying. "In any case, we'd like Arianespace, which
currently has almost no inspection rights on the Soyuz, to be given
more say in quality assurance."


So they do have a claim on the Russians,

Jan
 




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