I think the accuracy you want is more for your own mind/satisfaction then the correct illuminating of your globe. You will not/hardly see any difference in the illumination of your globe if your clock is 15 minutes ahead/behind. To be able to see that difference you need a very sharp shadow edge and that can only be achieved using a veeeery small light source. But to get the shadow on your globe correct that light source should be very far away, otherwise the illuminated part of the globe is to small. I guess the difference will be greater than the effect of the EOT.
Thibaud Chabot
At 09:52 14-02-2004, you wrote:
I would like to set up an eastward turning globe with the help of an anticlockwise 24 hour quartz movement so that the model planet would turn once within the solar day. In order to overcome the EoT problem as well as any lack of precision within the clockwork itself, would it not be possible to re-set such a clock movement each solar noon via a light signal, originating from an outdoor or a window-sill meridian dial, travelling through a fibre optics cable to the quartz movement? (Weather permitting of course) What type of electronic set-up would be required to translate the light signal into re-set action? If this could be achieved the model planet would turn in real time with its 'mastership'. Is this a correct assumption or am I dreaming? Or does all this exist anyway? No wish to re-invent the wheel. I am no practitioner and would appreciate some practical advice on such a project. Heiner Thiessen 51N / 1W -
--------------------------------------------------------------------- Thibaud Taudin-Chabot 52° 18' 19.85" North, 04° 51' 09.45" East, alt. -4.50 m home email: [EMAIL PROTECTED] -
