Subject:
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Re: GPS (was: mindstorms NXT and memory)
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 11 Jan 2006 03:08:34 GMT
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Original-From:
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Ignacio Martinez Vazquez <IGNAMV@GMAIL.nospamCOM>
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Viewed:
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1567 times
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> Hm. Well, when surveying I've sometimes used differential GPS (locating
> cave entrances, truth be told). This can get down to centimeter resolution
> IF you want to wait a long time, but certainy far better than 1 meter. Two
> NXT's with GPS, one as a base station (stationary) to do differential GPS
> with?
Cool! Might be complicated to calculate with the NXT, but I'm sure
there's a way (PIC PIC PIC :). But how do you accurately find the
coordinates of the base station? Google earth :P?
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Message has 2 Replies:
 | | Re: GPS (was: mindstorms NXT and memory)
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| (...) Well, Google earth isn't going to get you very far - the best precision it has is something like a half meter - but the photographs are likely to be aligned with real-world lat/lon coordinates using non-differential GPS. But what does your (...) (18 years ago, 11-Jan-06, to lugnet.robotics)
| | | localization (was re: GPS)
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| On another list, we've spent some time researching differential GPS. Turns out it's not as simple as having two GPS units compare notes. You have to know which satellites you are talking to, and that's complicated. They tend to switch on and off (...) (18 years ago, 11-Jan-06, to lugnet.robotics)
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