Beschreibung : Molniya 1/13 was a first-generation Russian communications satellite orbited to test and perfect a system of radio communications and television broadcasting using earth satellites as active transponders and to experiment with the system in practical use.
During its apogee, Molniya 1/13 remained relatively stationary with respect to the earth below for nearly 8 of every 12 hr. By placing three or more Molniya 1 satellites in this type of orbit, spacing them suitably, and shifting their orbital planes relative to each other by 120 deg, a 24-hr/day communication system could be obtained. The satellite probably ceased transmitting in June 1971.

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MOLNIYA-1 #13 TO #17 (SATELLITE) · YEAR 1970 · MOLNIYA-M BLOK-ML