[ntp:questions] NTP architecture recommendation

Uwe Klein uwe_klein_habertwedt at t-online.de
Mon Aug 20 11:11:16 UTC 2007


David J Taylor wrote:
> Uwe Klein wrote:
> 
>>David J Taylor wrote:
> 
> []
> 
>>>More in orbit, I expect, now dead.
>>>What do they do with decommissioned GPS satellites?
>>
>>afair they get a push into an orbit a bit outside the system "shell".
>>20000km is a bit high for deorbit. low flying sats are sceduled for
>>deorbit.
> 
> 
> Thanks, Uwe.  I know that geostationary satellites are moved into a 
> "graveyard" orbit, just outside the normal orbits, about 500km higher and 
> a slightly longer period.  There isn't enough propellant left to bring 
> them back to earth for burn-up.  I didn't know what happened to GPS 
> satellites, though.  Even the weather satellites at about 830km are not 
> de-orbited.
> 
> Cheers,
> David
> 
>
A bit more info:

http://gge.unb.ca/Resources/GPSConstellationStatus.txt

and:
You can go to heavens-above.com and search for "Navstar%"
to get all listed




More information about the questions mailing list