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ACCOMPLISHMENTS OF THE FIRST YEARS
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acceleration mechanisms Allen belt Atlantic Missile Range Atlas-Agena atmosphere basic spacecraft belt structure carried Centaur charged particles configuration detectors earth satellites earth's magnetic field electrons energetic solar particles energy spectra fields in space Geiger-Muller counter indicated instrumentation interplanetary kilograms large number launch vehicle launched on March Lox/H Lox/RP Lox/RP lunar surface magnetic field experiments magnetometer major group mission modulations NASA NASA PROGRAM Orbiting Astronomical Orbiting Astronomical Observatory Orbiting Geophysical Observatory outer belt Pacific Missile Range particle fluxes PARTICLES AND FIELDS particles and magnetic payload capabilities phenomena Pioneer Pioneer III planets Polar Orbiting pounds primary cosmic rays protons radial distances Ranger region satellites and space Saturn C-l Scout second stage solar flares solar plasma solar system solar wind Solid Solid Solid Space Flight space probes space science program spacecraft program spacecraft system spectrum Thor-Able Thor-Agena trapped radiation utilization of space vehicle and spacecraft vehicle program