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Altitude/height


Altitude/height
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Mikernav
Mikernav
Mikernav
posted 12/3/2013 12:45:54 AM
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What is the calculation basis for altitude and height in SD? Eg, is altitude based on 1013 QNH and height based on altitude less terrain height? Trying to understand discrepancy between altimeter set to RPS and SD's altitude.
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Tim Dawson
Tim Dawson
Tim Dawson
posted 12/17/2019 11:41:31 AM
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The only significant change from when this thread was started is that we now have a high-resolution terrain feature. If this is enabled, and high-resolution tiles have been downloaded for the area, the reading will be more accurate than the low-resolution tiles.

I still wouldn't expect it to necessarily be able to show a different value every second, in level flight over terrain of rapidly-changing elevation. It's not designed to replace a radio altimeter.
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Altitude/height
Mikernav - 12/3/2013 12:45:54 AM
     my SD shows exactly the same as my Garmin set to above sea level...
micromike - 12/3/2013 9:01:21 AM
     SkyDemon uses the GPS so altitude is derived absolutely rather than...
Tim Dawson - 12/3/2013 12:54:57 PM
             Thanks Tim.
Mikernav - 12/3/2013 5:51:15 PM
             At what frequency do you calculate and update Height AGL? Looking at...
TimT - 12/16/2019 6:11:22 PM
                 Surely the position refresh rate depends on the GPS source. A tablet’s...
grahamb - 12/16/2019 7:08:55 PM
     The only significant change from when this thread was started is that...
Tim Dawson - 12/17/2019 11:41:31 AM

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