[time-nuts] Thunderbolt - Lady Heather altitude does report abt 240m too high

Dana Whitlow k8yumdoober at gmail.com
Thu Oct 26 03:58:27 UTC 2017

Remember that GPS normally displays altitude with respect to the WGS84 datum
geoid, not with respect to MSL.  There can easily be a hundred feet or so of


On Wed, Oct 25, 2017 at 9:18 PM, Arnold Tibus <arnold.tibus at gmx.de> wrote:

> Hello fellow time nuts,
> after the thunderbolt roll over problem I run the survey control in Lady
> Heather (48h).
> Since then I am getting always a wrong elevation number for my qth.
> Does anybody know the reason for that behavior?
> Is there a solution to get again the correct value?
> Kind regards
> Arnold, DK2WT
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