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Garmin GLO/Android altitude discrepancy


Garmin GLO/Android altitude discrepancy
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StuartW
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StuartW
posted 6/17/2020 7:43:57 PM HOT
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Hi,

New user here.  My setup is as follows:

Huawei MediaPad T3 8"
Garmin GLO bluetooth GPS

I've paired the Garmin and setup Bluetooth GPS as mock GPS provider, however SkyDemon is showing an altitude discrepancy.

Bluetooth GPS says 75.5ft
Sky Demon says -70ft

whilst on the ground.
I've checked that Bluetooth GPS is NOT doing Altitude correction as mentioned in other threads.

If using the internal GPS, SkyDemon appears to be correct.

What am I missing please.

StuartW
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Garmin GLO/Android altitude discrepancy
StuartW - 6/17/2020 7:43:57 PM
     It's doing altitude correction. Really. Probably the mock GPS app...
Tim Dawson - 6/19/2020 8:25:43 AM
             I've now tried two different mock gps apps - Bluetooth GPS...
StuartW - 6/19/2020 8:33:59 AM
     Given the accuracy of a Garmin Glo is 3m, I would say an altitude...
PaulSS - 6/19/2020 10:01:54 AM
             I think you have misread the discrepancy Paul: Bluetooth GPS says...
StuartW - 6/19/2020 10:05:33 AM
     Geoid undulation varies from place to place, but 145ft would not be an...
grahamb - 6/19/2020 10:47:09 AM
             Agreed - but in the perspective of this issue I'm still confused....
StuartW - 6/19/2020 10:54:57 AM
     You're absolutely correct, I did miss the minus sign. In the big...
PaulSS - 6/19/2020 3:54:30 PM
             Perhaps its cause I haven't actually been in the air with SkyDemon...
StuartW - 6/19/2020 4:06:13 PM
     HMmmm, I don't think you'll be flying looking at the SkyDemon 'radar'...
PaulSS - 6/19/2020 6:46:32 PM
             That is a very fair point
StuartW - 6/19/2020 7:13:52 PM
     GPS providers on Android are not supposed to apply geoid correction,...
Tim Dawson - 6/22/2020 9:01:52 AM
             Could you help me understand something - is this correction positive...
StuartW - 6/22/2020 9:10:32 AM
     It could be positive or negative depending upon where you are in the...
Tim Dawson - 6/23/2020 2:24:52 PM
             Tim, thank you, although the issue still remains (or maybe not) Is...
StuartW - 6/23/2020 2:30:51 PM
     I am pretty sure a solution was offered on the first page. To clarify,...
Tim Dawson - 6/24/2020 8:56:43 AM
             I've gone back and read the whole of the first page and don't see a...
StuartW - 6/24/2020 9:05:03 AM
     Can you let me know when you emailed support? I will find out what...
Tim Dawson - 6/25/2020 9:00:11 AM
     Having discussed this with my colleague, it appears she engaged you by...
Tim Dawson - 6/25/2020 9:05:31 AM
     Can you make GPS correction optionable? I tried to fly in X-Plane this...
177 - 4/13/2021 10:03:55 PM
     That's because whatever you're using to push location into Android is...
Tim Dawson - 4/14/2021 9:47:41 AM

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