[time-nuts] Information on the Danjon Astrolab

[bg at lysator.liu.se]

On Tue, August 8, 2006 10:33, Poul-Henning Kamp said:
> In message <20060808.102323.-861060158.cfmd at bredband.net>, Magnus
> Danielson wri
> tes:
>
>>> You would really need to know the direction of local gravity for
>>> this to be any good...
>>
>>Down? :-)
>
> There's a big difference between "down enough that cows don't easily
> tip over" and "passes through the center of the earth".

Next time you have a surprice visit from a strategic submarine, be sure to
ask the navigator for the local gravity anomalies!

Or check the deflection from one of the earth gravity models.

--

    Björn