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The Diapason 1A was a French geological research satellite launched in 1966 with the purpose of establishing the earth's shape and precise intercontinental distances. The Diapason 1A was a simple cylinder, about 50 cm in diameter and 20 cm long with four unfolding solar panels to provide electrical power in orbit.
 Research Diapason 1A
The Sereb Diamant was a French three-stage space rocket of the 1960's designed as a launch vehicle to put into orbit satellites weighing up to 80 kg. A Sereb Diamant rocket launched the Asterix 1(A1) test satellite in November 1965, the Diapason 1A satellite in February 1966 and the Diademe 1 Satellite in February 1967, these being the first orbital launchings made by a country other than the USA and USSR. The Sereb Diamant was 1875 cm long and had a maximum diameter of 140 cm.
Research Sereb Diamant
In music, a diapason is the concord of the first and last notes of an octave. The word is also used for the most important foundation-stops of an organ. They are of several kinds, as open diapason, stopped diapason, double diapason. The French use the term as equivalent to pitch in music.
Research Diapason
A gedact or gedeckt is a flute-like stopped metal diapason organ pipe.
Research Gedact
An open diapason is a certain stop in an organ, in which the pipes or tubes are formed like the mouthpiece of a flageolet at the end where the wind enters, and are open at the other end.
Research Open Diapason
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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