SkyDemon Forums

Altitude accuracy

http://forums.skydemon.aero/Topic32188.aspx

By Colin9 - 9/19/2020 4:58:51 PM

Always use Skydemon during aeros to confirm compliance.
After last flight had a look to see two altitude busts with a max at 6734ft having started at 5000ft and a dive to zero ft and back.
Plan view was very accurate.
Downloaded a virtual radar of the exercise which confirmed nothing over 5500ft and the vertical profile matched the exercise.

Any clues as to how the altitude is measured and why the error should be so large?

Thanks,
Colin 
By Tim Dawson - 9/22/2020 9:43:48 AM

It's worth noting that GPS altitude inaccuracy is magnified during aerobatics as line-of-sight to the satellites is repeatedly blocked by different bits of the aircraft. I would be very surprised if GPS altitude was NOT wrong during aerobatics, perhaps significantly so.