![]() Explorer 47 satellite | |
Names | IMP-H IMP-7 Interplanetary Monitoring Platform-7 |
---|---|
Mission type | Space physics |
Operator | NASA |
COSPAR ID | 1972-073A |
SATCAT no. | 06197 |
Mission duration | 6 years (achieved) 51 years, 10 months, 25 days (in orbit) |
Spacecraft properties | |
Spacecraft | Explorer XLVII |
Spacecraft type | Interplanetary Monitoring Platform |
Bus | IMP |
Manufacturer | Goddard Space Flight Center |
Launch mass | 390 kg (860 lb) |
Dimensions | 157 cm (62 in) in height and 135 cm (53 in) in diameter |
Power | Solar cells and batteries |
Start of mission | |
Launch date | 23 September 1972, 01:20:00 UTC[1] |
Rocket | Thor-Delta 1604 (Thor 579 / Delta 090) |
Launch site | Cape Canaveral, LC-17B |
Contractor | Douglas Aircraft Company |
Entered service | 23 September 1972 |
End of mission | |
Deactivated | 31 October 1978 |
Orbital parameters | |
Reference system | Geocentric orbit[2] |
Regime | High Earth orbit |
Perigee altitude | 201,599 km (125,268 mi) |
Apogee altitude | 235,699 km (146,457 mi) |
Inclination | 17.20° |
Period | 17702.00 minutes |
Instruments | |
Charged Particle Measurements Experiment (CPME) Electrons and Hydrogen and Helium Isotopes Energetic Electrons and Protons Ions and Electrons in the Energy Range 0.1 to 2 MeV Magnetic Fields Experiment Measurement of Low-Energy Protons and Electrons Plasma Wave Solar and Cosmic-Ray Particles Solar Flare High-z/Low-e and Low-e Isotope Solar Plasma Electrostatic Analyzer Solar Plasma Faraday Cup Solar Wind Ion Composition Study of Cosmic-Ray, Solar and Magnetospheric Electrons | |
Explorer 47 (IMP-H or IMP-7), was a NASA satellite launched as part of the Explorers program. Explorer 47 was launched on 23 September 1972 from Cape Canaveral, Florida, with a Thor-Delta 1604. Explorer 47 was the ninth overall launch of the Interplanetary Monitoring Platform series, but received the launch designation "IMP-7" because two previous "Anchored IMP" flights had used "AIMP" instead.[3][4]
Trajectory
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