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- Explorer 24 was placed in orbit together with Explorer 25 from a single launch vehicle. Explorer 24 was identical in configuration to the previously launched balloon satellites Explorer 9 and 19. The spacecraft was 3.6 m in diameter, was built of alternating layers of aluminum foil and plastic film, and was covered uniformly with 5.1-cm white dots for thermal control. It was designed to yield atmospheric density near perigee as a function of space and time from sequential observations of the sphere's position in orbit. To facilitate ground tracking, the satellite carried a 136-MHz tracking beacon. The satellite reentered the earth's atmosphere on October 18, 1968. http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1964-076A Group: Platform_Details Entry_ID: AD-B Group: Platform_Identification Platform_Category: Earth Observation Satellites Platform_Series_or_Entity: AD (Atmospheric Dynamics) Short_Name: AD-B Long_Name: Atmosphere Dynamics B (Explorer 24) End_Group Group: Synonymous_Platform_Names Short_Name: EXPLORER 24 Short_Name: 00931 End_Group Group: Platform_Associated_Instruments Short_Name: OPTICAL BEACON End_Group Group: Orbit Orbit_Inclination: 81.4 degrees Period: 116.3 minutes Perigee: 525 km Apogee: 2498 km Orbit_Type: LEO > Low Earth Orbit > Polar Sun-Synchronous End_Group Creation_Date: 2007-08-22 Online_Resource: http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1964-076A Group: Platform_Logistics Launch_Date: 1964-11-21 Launch_Site: Vandenberg Air Force Base, USA Primary_Sponsor: NASA End_Group End_Group
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