Tag Archives: Go GLONASS!

Horrible SV Constellation, Even with GLONASS

I bet you think that just because you have GLONASS you will ALWAYS be able to survey.

Not so fast! Check out this constellation from Salt Lake City at 1:35 pm 22 Jan 2014:


Yes, that is 3 US SV’s above 30 degrees and
4 GLONASS SV’s above 30 degrees.

Surprisingly the HDOP = 0.68, VDOP = 1.38 and GDOP 1.93. Without tracking GLONASS, I don’t know how much RTK work we could get done right now.

I guess the take-away is “Don’t think you never need to mission plan, even if you have GLONASS. I can’t fix in the parking lot with a 2-meter pole, but with a 15′ pole:





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