+Minimike2 Posted April 21, 2010 Share Posted April 21, 2010 Are there any GPSr handhelds available that use all the satellite systems simultaneously? What would it mean for accuracy if they do? Quote Link to comment
+ecanderson Posted April 21, 2010 Share Posted April 21, 2010 (edited) Are there any GPSr handhelds available that use all the satellite systems simultaneously? What would it mean for accuracy if they do? I was just noting that the new SiRF IV chips are capable of 48 channel operation per their spec sheet. I'm not clear what they're anticipating with a count that high, but one can only imagine that with a count as crazy as that, pulling in signals from both systems is where they're headed. Accuracy should improve during the less-than-peak moments where the US or Euro satellites aren't ideally configured in the sky for a given location. That said, I haven't yet heard of a purpose-built GPS manufacturer that is employing the SiRF IV, and of course, Galileo isn't functional yet, and I don't think GLONASS provides the better HP accuracy signal to any but "authorized" users. Someone posted a URL where you could input your location and see the combined signal quality for the constellation configuration for a particular point in time (graphed) for the US satellites. Darned if I can find the silly thing now, and I have need of it. Anyone recall where that is? Edited April 21, 2010 by ecanderson Quote Link to comment
+cterres Posted April 21, 2010 Share Posted April 21, 2010 There are some handheld computers with dual frequency receiver that uses GPS and GLONASS, but they are for professionals and priced around $10k. Yes, you get a better accuracy with this, but you need to pay the big price for this too. Quote Link to comment
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