The U.S. will probably launch a trial earth satellite some time this fall, perhaps in October. Speaking last week before a meeting of the International Scientific Radio Union, which drew delegates from 23 nations to the University of Colorado in Boulder, the Navy's Dr. John P. Hagen, civilian scientist, gave the most complete report yet on U.S. plans to launch a covey of man-made moons in the International Geophysical Year (June 30, 1957 through Dec. 31, 1958).
As director of Project Vanguard, Hagen said that, starting this fall, four grapefruit-size satellites will be launched to test radio-tracking systems for the six major...
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