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Here are details about a :
Space commemorative cover
or Space Cover.

Kosmodrom / Ort : USA

Stempeldatum: 9 Mar. 1975
Ereignisart : Start
Startrampe / Ort : USA Vandenberg SFB (CA)
Bemannte / Robotische Mission : Robotisch
Missionsziel/-typ : Militärisch / Geheim

MIL

ou?/where?: au sol - ground
autographe?: non - none

Beschreibung : In their elliptical orbits they would move very slowly over the northern hemisphere for most of their orbital period, allowing interception of microwave line-of-sight communications beams. Since they would move slowly through the beams during their orbit, a constellation of such satellites was required to monitor Soviet communications throughout the day.
Vandenberg post stamp and Afsatcom satellite.

Schlüsselwort/-wörter :
#Planet,
#Satellit,
#Telekommunikation,

Ist AUSSERHALB der Weltraum-Revuen.

Letzte Änderung: 09/04/2015 @ 12h17