| Sam Wormley 2008-02-26, 10:33 pm |
| GLONASS to Begin CDMA Signal Broadcasting
http://sidt.gpsworld.com/gpssidt/co...p.jsp?id=494612
Feb 26, 2008
GPS World
MUNICH, Germany \u2014 Final Russian government approval of code
division multiple access (CDMA) signals for broadcast from GLONASS
satellites is expected this week, according to Sergey Revnivykh,
deputy head of the GLONASS Mission Control Center.
Revnivykh made the pre-announcement on February 20 at the Munich
Satellite Navigation Summit. When pressed by the audience for
confirmation, he smiled and said, "It would be better if the
announcement comes next week in Moscow."
GLONASS currently broadcasts frequency division multiple access
(FDMA) signals. Adding a CDMA signal would go a long way towards
making the Russian satellite navigation system compatible with GPS
and with the nascent European Galileo system.
In his briefing on current and prospective GLONASS status, Revnivykh
made these further points:
* The importance of the program for the Russian government
increased markedly in 2007.
* Efforts target improved geodesy and time reference, and
improved accuracy; an issue regarding digital maps is to be
resolved as soon as possible.
* Staff is making preparations for further development and
extension of GLONASS in the 2012-2020 timeframe.
* 2006 saw the first program update, with speedup of full
deployment efforts. In 2008, users can anticipate the second
program update: provision of GLONASS service competitiveness
with other systems. This will get underway with multiple
satellite launches: three GLONASS-M satellites in September
2008, and three more GLONASS-M satellites in November. This will
bring the total to 22, however it will fall back to 18
operational satellites as older space vehicles reach the end of
their life.
* The next-generation GLONASS-K satellites will begin launching
in 2010 or 2011. A further modernization effort with yet a newer
satellite, GLONASS-KM, will begin in or after 2012.
* Further system information is available at the websites of the
PNT Information Analysis Center (IAC), www.glonass-forum.ru and
www.glonass-ianc.rsa.ru
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