Quote:
Originally Posted by billbo911
For civilian GPS, you are correct. In fact, when I backpack, my GPS is sufficient. If I know where I am within 3 meters, I'm really happy!
But remember, I said to consider what is used in surveying and construction. Thing in the 1 - 3cm accuracy range.
Good enough for robots???
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Surveying and construction are done out doors and therefore will have cleaner signals.
To get to the 1-3cm accuracy from a non-military GPS you'd need 4-5 signals from different GPS satalites and time to syncronize them (hours). In addition, reflections cause havoc in such systems, nevermind the EM field around the robot.