satellite communications, military requirements, reliable, survivable, secure, telecomunications.
highly mobile forces, worldwide. Department of Defense rate of commercial and military systems. long-haul commmunications, wideband modulati0on techniques. Defense Communication Satellite program (dcsp) outgrowth of Advent Program. Initial Defense Communication Satellite Program (IDCSP). Gravity gradient experimental satellite, near synchronous orbits. 1968. Defense Satellite Communication system (DSCS PHASE II) analog to all digital communication system.
