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

Cosmódromo / Lugar : EE.UU.

Fecha de matasellos: 9 Mar. 1975
Tipo de Evento : Lanzamiento
Plataforma / Lugar : EE. UU. Vandenberg SFB (CA)
Misión Tripulada / Robótica : Robótica
Objetivo/Tipo de Misión : Militar / Secreto

MIL

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

Descripción : 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.

Palabra(s) clave :
#Planeta,
#Satélite,
#Telecomunicaciones,

Está FUERA de las Revistas del Espacio.

Última modificación: 09/04/2015 @ 12h17