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IMP 4

ResourceID
spase://SMWG/Observatory/IMP4

Description

This spacecraft was placed into a high-inclination, highly eccentric earth orbit. The apogee point was located near the ecliptic plane and had an initial local time of about 1900 h. The spacecraft was spin-stabilized and had an initial spin period of 2.6 s. The spin vector was approximately perpendicular to the ecliptic plane. Like the earlier IMPs, this spacecraft was instrumented to study interplanetary magnetic fields, energetic particles, and plasma. The spacecraft optical aspect system failed on March 4, 1969. Otherwise, useful data were acquired until just before spacecraft reentry, which occurred on May 3, 1969.

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Details

Version:2.2.0

Observatory

ResourceID
spase://SMWG/Observatory/IMP4
ResourceHeader
ResourceName
IMP 4
AlternateName
1967-051A
AlternateName
IMP-F
AlternateName
Explorer 34
ReleaseDate
2019-05-05 12:34:56Z
Description

This spacecraft was placed into a high-inclination, highly eccentric earth orbit. The apogee point was located near the ecliptic plane and had an initial local time of about 1900 h. The spacecraft was spin-stabilized and had an initial spin period of 2.6 s. The spin vector was approximately perpendicular to the ecliptic plane. Like the earlier IMPs, this spacecraft was instrumented to study interplanetary magnetic fields, energetic particles, and plasma. The spacecraft optical aspect system failed on March 4, 1969. Otherwise, useful data were acquired until just before spacecraft reentry, which occurred on May 3, 1969.

Contacts
RolePersonStartDateStopDateNote
1.ProjectScientistspase://SMWG/Person/Frank.B.McDonald
InformationURL
Name
NSSDC's Master Catalog
URL
Description

Information about the IMP-F mission

ObservatoryGroupID
Location
ObservatoryRegion
Heliosphere.NearEarth