A ABMA, 17 Agena B, 21, 22, 40 Antennas, 66 Goldstone, description, 70, 71, 73 onboard, description, 30, 31 directional control, 30 Pioneer tracking site, 70, 71 ARPA, 17 Astronomical unit, 111 refinement, 107 Atlantic Missile Range, 2, 10, 43, 83 Atlas-Agena B, 63, 52 Atlas D, 19, 21, 36-39, 89 Attitude control Atlas D, 38 Earth acquisition, 58 loss of control and reorientation, 56, 60 Attitude control system, 31, 32 B Battery, 25, 27 Bumper-WAC, 18 C C-133 aircraft, 43 Centaur, 8 Central Computer and Sequencer, 28 commands, 56, 58 failure at encounter, 62 midcourse maneuver control, 59 Central Computing Facility, 81, 82 Charged particles, 13, 90 Charged particle detector, 35, 88 Computers, data processing, 84 Corporal E, 18 Cosmic dust, 13 density, 110 distribution and mass, 94, 95 measurement, 89 Cosmic dust detector, 35, 68, 87, 89 Cosmic radiation, 13, 96 Cosmic ray flux, 98 D Data conditioning system, 88 Data processing, 30, 74, 85 CCF, equipment and operation, 82, 83 launch and tracking operations, 83 telemetry data, 84 transmission time, 88 Detectors charged particle, 35 cosmic dust, 35 solar plasma, 35 DSIF, 73, 74, 75, 82, 83, 84 functions, 68 Goldstone, 1, 64, 67-79, 68, 69, 70, 71, 73, 75, 84, 107, 108, 109 Johannesburg, 64, 67, 68, 73 Mobile, 68, 73, 80 tracking during midcourse maneuver, 56 orientation, 56 Woomera, 67, 68, 71, 73, 75 E Earth sensor final orientation commands, 64 September 8, crises and recovery, 60 Echo Project, 69 Echo site functions, 71 Electronics equipment weight, 25 Explorer I, 19 Experiments, 35 Anton special purpose tube, 87 atmospheric investigation, 85 charged particle detector, 88, 96-100 density variation data, 98 radiation hazard findings, 98 cosmic dust detector data, 87-89, 94, 95 high energy radiation, 90 infrared radiometer, 87, 93 ion chamber and Geiger-Mueller tubes, 87 magnetometers, 87, 88 microwave radiometer, 87, 91-93 objectives, 13, 93 processing of data, 85 radiometers, 85, 105, 106 responsible organizations, 88 results, 110-112 solar plasma detector, 87-90 temperature investigation, 85 transmission of data, 88 weight, 25