Pictorial review: Explorer IV

SUCCESSFUL launching of the Explorer IV scientific Earth satellite is the U.S. Army´s contribution to the over-all Department of Defense program with the International Geophysical Year (ICY) research program, which is sponsored by the National Academy of Sciences. The weight of Explorer IV is 25.76 pounds for the satellite proper, 12.67 pounds for the final stage after burnout, or a total orbiting weight of 38.43 pounds. The dimensions are 34 inches in length for the satellite proper, 46 inches in length for the final-stage motor, or a total length for the orbiting vehicle of 80 inches. The diameter of the satellite and of the final stage is six inches.