Explorer 47

Explorer 47
Explorer 47 satellite
NamesIMP-H
IMP-7
Interplanetary Monitoring Platform-7
Mission typeSpace physics
OperatorNASA
COSPAR ID1972-073A Edit this at Wikidata
SATCAT no.06197
Mission duration6 years (achieved)
52 years, 1 month, 16 days
(in orbit)
Spacecraft properties
SpacecraftExplorer XLVII
Spacecraft typeInterplanetary Monitoring Platform
BusIMP
ManufacturerGoddard Space Flight Center
Launch mass390 kg (860 lb)
Dimensions157 cm (62 in) in height and 135 cm (53 in) in diameter
PowerSolar cells and batteries
Start of mission
Launch date23 September 1972,
01:20:00 UTC[1]
RocketThor-Delta 1604
(Thor 579 / Delta 090)
Launch siteCape Canaveral, LC-17B
ContractorDouglas Aircraft Company
Entered service23 September 1972
End of mission
Deactivated31 October 1978
Orbital parameters
Reference systemGeocentric orbit[2]
RegimeHigh Earth orbit
Perigee altitude201,599 km (125,268 mi)
Apogee altitude235,699 km (146,457 mi)
Inclination17.20°
Period17702.00 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
← IMP-I
IMP-J →

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]

  1. ^ "Jonathan's Space Report". 21 July 2021. Retrieved 15 November 2021.
  2. ^ Cite error: The named reference Trajectory was invoked but never defined (see the help page).
  3. ^ "Display: Explorer 47 (IMP-H) 1972-073A". NASA. 28 October 2021. Retrieved 15 November 2021. Public Domain This article incorporates text from this source, which is in the public domain.
  4. ^ "IMP H, I, J (Explorer 43, 47, 50)". Gunter's Space Page. 8 April 2020. Retrieved 15 November 2021.