[time-nuts] Information on the Danjon Astrolab

[Brooke Clarke]

Hi:

After seeing a reference to "Splitting the Second" by Tony Jones on 
Tom's web page I read it and found that the Photographic Zenith 
Telescope was replaced by the "Danjon Astrolabe".   But Google provides 
almost no information about it.  A patent search has turned up a number 
of optical systems, mostly for spacecraft, that use star separation for 
navigation, and if used at a know location on the earth could be used 
for timing.  For these see my  Stellar Time Keeping web page: 
http://www.pacificsites.com/~brooke/StellarTime.shtml

Does anyone know how a "Danjon Astrolabe" works?

Have Fun,

Brooke Clarke
-- 

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