November 9, 2007:
Russia recently put another three
GLONASS satellites in orbit. That makes 16 up there. Russia plans to have the
system operational in two years. Russia's answer to GPS, GLONASS, was at full
strength (24 satellites) shortly after the Cold War ended (1995). But the end
of the Cold War meant the end of the regular financing for GLONASS. Maintaining
the system will mean launching replacements satellites every 5-7 years. By the
end of 2002, only seven GLONASS birds were still operational. However, a series
of launches in 2003 increased the number of active satellites to twelve, and
was supposed to go to 18 by the end of 2007, and the full 24 birds a year or
two after that. Russia has kept pretty close to that schedule.
The money is coming from a Russian government that
does not want to be dependent on the American Department of Defense controlled
GPS system. But the money is only there because of high oil prices. Most
GLONASS receivers in use are actually combined GPS/GLONASS receivers. Russia
will have to put billions of dollars into GLONASS over the next few years to
get the system fully operational, and then spend even more money to maintain
the satellite network.
Worse yet, no one has found a way to make a buck
off a network of navigation satellites. At least not directly There are plenty
of ideas, but no one has yet turned any of those ideas into cash.
But GLONASS is doing a lot better than the third
competitor. A European consortium is going forward with its own version of GPS,
called Galileo. So far, only two satellites have been launched, one simply for
research, although the original plan called for four to be up there by now, to
provide a sufficient number of birds for a test system. As it is, a third test
satellite is to be launched by the end of the year.
If there are no problems with the test system, the
full array of 30 satellites will be launched and operational sometime in the
next decade. The system will cost over $11 billion when completed, and the
fifteen nations of the European Space Agency (ESA) have put in several hundred
million dollars already. This however, is more than twice what the system was
originally expected to cost.
The Europeans don't like being dependent on an American
system, and don't believe the Russians will be able to keep their GLONASS
system viable. If Galileo becomes operational, the European nations will pay
for it, but anyone can use it. Dual signal (GPS and Galileo) receivers won't
cost much more (maybe 20 percent more) than GPS receivers do. Having two
separate sets of signals makes for more reliable and accurate receivers. Also,
the way Galileo is being set up, it will provide improved reliability in higher
latitudes and in built up areas. The ESA is trying to develop a way to get
people to pay for additional Galileo services, but so far no one has come up
with anything that seems likely to work. Meanwhile, there is increasing
pressure to abandon the effort, because so many nations do not want to pay for the
escalating costs.