Posted by Matt in February 9th, 2008
In any case, the fact that GLONASS’s performance is worse than GPS is not a recent development. It always has been, and in recent years Russian GNSS experts have been forthright in detailing the shortcomings. (See, for instance, the overview article on GLONASS in the first issue of Inside GNSS.
The poorer performance is the culmination of a variety of factors: poorer on-board atomic clocks, less stability and predictability in the satellite orbits (and therefore less accuracy in GLONASS broadcast ephemerides), fewer satellites providing signals, an operational control and ground monitoring segment limited to Russian territory, “biases†in the transmissions from multiple frequencies that require more complicated receiver designs to calibrate accurately, and so forth.
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Map for Moscow, Russia
[Countries link to CIA Factbook. States link to Wikipedia.]
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