GNSS – What satellites are up and operational (1-12-2011)?
With 23 GLONASS satellites now available, GG receivers (GPS & GLONASS) have 53 satellites to observe to!
Here is a brief summary of the current GPS & GLONASS constellations (1-12-2011).
GPS Status:
30 operational
http://www.glonass-center.ru/en/GPS/
Block IIA (advanced)
11 in service
Launched 1990 – 1997
7.5yr lifespan
L1 & L2
Block IIR (replenishment)
12 in service
Launched 1997 – 2004
7.5yr lifespan
L1 & L2
Block IIR(M) (modernized)
7 in service
Launched 2005 – 2009
7.5yr lifespan
L1, L2 & L2C (plus 2 new jam-resistant military signals)
Block IIF (follow-on)
2 (10 on the way)
Launched 2010–>
12yr lifespan
L1, L2 & L5
Block IIIA (Lockheed Martin)
?
Future
15yr lifespan
L1, L1C, L2 & L5
GLONASS Status:
23 operational
http://www.glonass-center.ru/en/GLONASS/
GLONASS-M (second generation)
23 in service (30 launched)
Launched 2003 - 2007.
7yr lifespan
L1OF, L1SF, L2OF & L2SF
GLONASS-K1 (third generation)
1 (in flight-testing)
Launched 2011->
10yr lifespan
L1OF, L1SF, L2OF, L2SF & L3OC (L1 (FDMA), L2 (FDMA), & a 3rd civi signal (CDMA))
GLONASS-K2 / -KM are in the design and research phases (2013+).
Sources:
http://en.wikipedia.org/wiki/GLONASS
http://www.glonass-center.ru/en/GLONASS/
http://www.glonass-center.ru/en/GPS/