In 1960 on this date, NASA launched the third ECHO test balloon to an altitude of 225 miles. Radio transmissions were reflected via the 100-foot-diameter inflatable sphere from Holmdel, New Jersey, to Round Hill, Massachusetts.
In 1960 on this date, NASA launched the third ECHO test balloon to an altitude of 225 miles. Radio transmissions were reflected via the 100-foot-diameter inflatable sphere from Holmdel, New Jersey, to Round Hill, Massachusetts.