Determination of the Longitude of Helwân Observatory by Wireless Telegraphy in 1921 April-May

Details Determination of the Longitude of Helwân Observatory by Wireless Telegraphy in 1921 April-May Determination of the Longitude of Helwân Observatory by Wireless Telegraphy in 1921 April-May

Nov 1922

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1922helob..25..269k&link_type=abstract

Helwan Institute of Astronomy and Geophysics Bulletins, vol. 25, pp.269-279

Physics

Geophysics

Scientific paper

The Determination of Local Time - Reception of Wireless Signals - Reduction of the Observations - The Derivation of the Longitude of Helwân - Probable Errors --
Table I: Transit Observations - Table II: Transit Observations on 1921 May 3 - Table III: Reception of the Lyons W/T Signals on 1921 May 3 - Table IV: Times of Receipt of Signals at Helwân on 1921 May 3 - Table V: L.M.T. of Receipt of Signals at Helwân - Table VI: Differences of Times of Receipt of Signals. Means of First and 300th Signals - Table VII: Differences of Greenwich and Paris Times from the Mean of Six Observatories

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