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GPS Accuracy Discrepancy
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GPS Accuracy Discrepancy

by morrcahn on Sun Apr 20, 2014 5:04 pm

It's stated on the product page (https://www.adafruit.com/products/746) for the Adafruit Ultimate GPS that it has a 1.8 m positional accuracy, while the datasheet itself (https://www.adafruit.com/datasheets/GlobalTop-FGPMMOPA6H-Datasheet-V0A.pdf page 16) says that it can provide 2.5 m accuracy with assistance. Is there something I missed? Thank you ahead of time.
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Re: GPS Accuracy Discrepancy

by adafruit_support_rick on Mon Apr 21, 2014 5:36 am

Not sure - I'll check

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Re: GPS Accuracy Discrepancy

by adafruit2 on Mon Apr 21, 2014 12:36 pm

That's odd, that number didn't come from nowhere - will change to 3m until we figure out where 1.8m came from!

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Re: GPS Accuracy Discrepancy

by morrcahn on Mon Apr 21, 2014 1:05 pm

Ah, interesting. I'm interested to know where it came from. Thank you!
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Re: GPS Accuracy Discrepancy

by skypuppy on Wed May 28, 2014 6:52 pm

Those 2 and 3 meter numbers are *theoretical* maximums. In real life, it is usually more like 10 to 20 meters at best. If you can't use the WAAS signal, then altitude readings are just best guesses and can vay by 30 meters from one second to the next.

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Please be positive and constructive with your questions and comments.