[time-nuts] Time Nuts at PTTI this past week

Magnus Danielson cfmd at bredband.net
Sat Dec 9 16:25:38 EST 2006

From: bg at lysator.liu.se
Subject: Re: [time-nuts] Time Nuts at PTTI this past week
Date: Sat, 9 Dec 2006 20:08:04 +0100 (CET)
Message-ID: <1985. at webmail.lysator.liu.se>

> On Sat, December 9, 2006 17:52, Magnus Danielson said:
> > Remember that while you are 1340 meters up, the mountains gravity pull
> > creates a local compensation to a small degree, so you will not fully
> > experience the full altitude difference.
> Would that mountaing gravity pulling be accounted for when measuring geoid
> height? ie compensate your GPS ellilsoid height with the geoid separation
> to get "true" mean sea level heigth.

What beats calculation is actual measurements. There are field devices capable
of 6-7 digit resolution. That should suffice. Would not be too hard to bring in
the back of the truck alongside a tripplet of 5071s.


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