Author Topic: GPS Altitude accuracy  (Read 477 times)

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Offline newkid4si

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GPS Altitude accuracy
« on: March 31, 2017, 08:02:11 PM »
One of the blocks of information in the "GPS Diagnostic View" is Altitude.  Any thoughts on its accuracy for monitoring water level fluctuations when recording on a reservoir at different times throughout the year?  Water level is not monitored and several launches are used.

           Mike 


Offline rnvinc

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Re: GPS Altitude accuracy
« Reply #1 on: April 01, 2017, 07:21:37 PM »
Interesting Mike ... I've never even thought about it ...

I will make a note to check it with my lake's water level ...

Rickie.

Offline tschultz

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Re: GPS Altitude accuracy
« Reply #2 on: April 04, 2017, 05:02:24 AM »
Of the three axis altitude has the highest degree of error. General consumer gps is not really accurate enough to account for water level changes, you'd need to step up to a survey type grade gps with rtk.

With a standard consumer gps your altitude error is in the range of plus minus 10-50 ft. Good for an idea but not really for water level corrections.

Offline newkid4si

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Re: GPS Altitude accuracy
« Reply #3 on: April 05, 2017, 08:36:20 PM »
Thank you for taking the time to post this.  I was afraid that was to good to be true.  Now I have to go around the lake and mark seven different launches.

        Mike


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