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Pocket GPS World :: View topic - Russia launches latest GLONASS-M satellite
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Russia launches latest GLONASS-M satellite

 
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Darren
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PostPosted: Thu May 02, 2013 3:36 pm    Post subject: Russia launches latest GLONASS-M satellite Reply with quote

pocketgpsworld.com
Russia successfully launched another satellite for their GLONASS network on April 26th,

The GLONASS-M was launched into orbit atop a Soyuz 2-1b Fregat-M booster and will shortly begin a long testing phase before it is activated for service.

GLONASS-M is the second generation of GLONASS satellite and has an enhanced operational lifetime of 7 years. Each satellite consists of a large, dual panel solar array and 25 L-Band channels broadcasting in tow frequency bands between 1240 and 1602MHz. Atomic clocks provide the reference timing signals accurate to more than 1000 nanoseconds.

Upto 3 GLONASS satellites can be launched on one rocket when using the Proton family of boosters but only single satellite launches are possible using Soyuz 2-1b.

Once commissioned, this satellite will join the existing fleet of 23 active satellites.

Source: pravda.ru

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M8TJT
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Joined: Apr 04, 2006
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PostPosted: Thu May 02, 2013 4:45 pm    Post subject: Reply with quote

1000 nanoseconds? That's 1 microsecond. That's not very accurate. Light and radio waves travel about 300m in that time Shocked and that's not much use for GPS accuracy.
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Oldboy
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PostPosted: Thu May 02, 2013 6:42 pm    Post subject: Reply with quote

M8TJT wrote:
That's not very accurate.
If that is 'per year' it's still not that accurate. Most atomic clocks run at about 10 to the power of -9, which is roughly 1nS per day (365 per year).
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