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a rarely used name for magnesium alloys. It was used in the 1920’s for the first industrial magnesium alloys based on the Mg-AI-Zn and Mg-Mn systems, which contained up to 10 percent aluminum, up to 3 percent zinc, and up to 2.5 percent manganese.
the name of a series of Soviet artificial earth satellites designed to study the earth’s radiation belt, cosmic rays, the chemical composition of near-earth space, short-wave solar radiation, galactic radio emission, and micrometeorites.
|Table 1. Flights of Elektron earth satellites|
|Initial orbital parameters|
|Perigee (km)||Apogee (km)||Declination (degrees)||Period of revolution (min)|
|Elektron 1. Jan. 30, 1964||406||7,100||61||169|
|Elektron 2 . Jan. 30, 1964||406||68,200||61||1,360|
|Elektron 3 . July 11, 1964||405||7,040||60.87||168|
|Elektron 4 . July 11, 1964||459||66,235||60.87||1,314|
Elektron 1 and Elektron 3 weighed 350 kg and had a diameter of 0.75 m and a length of 1.3 m; Elektron 2 and Elektron 4 weighed 445 kg and had a diameter of 1.8 m and a length of 24 m (see Table 1 for additional data). The measurements made by the Elektron satellites made it possible to study the time variations of the characteristics of near-earth space during various levels of solar activity. The Elektron satellites were launched in pairs using one launch vehicle.