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Injun 3

Injun-3 [NRL]

Injun 3 was a magnetic field-aligned-spacecraft instrumented for a study of geophysical phenomena, particularly high-latitude and auroral.

It used an integrated system of several particle detectors, a VLF detector, and three auroral photometers. A fluxgate magnetometer was used to monitor the orientation of the spacecraft with respect to the local magnetic field. Injun 3 had two separate telemetry and encoding systems: mode 1 (PCM/FSK/PM) and mode 5 (PCM/FSK/AM). These systems were powered by a common-battery solarcell power supply.

The spacecraft was launched simultaneously with and successfully separated from a combo of U.S. Air Force spacecraft. Injun 3 performed normally until late October 1963 when the satellite power supply (chemical batteries) failed. The satellite command system was partially impaired after some time in March 1963. The satellite decayed from orbit 25 August 1968.

Nation: USA
Type / Application: Research, ionosphere
Configuration: NRL 20in sphere
Propulsion: None
Power: Solar cells, batteries
Mass: 52 kg
Orbit: 231 km × 2774 km, 70.34
Satellite COSPAR Date LS Launch Vehicle Remarks
Injun 3 1962 βτ 2 13.12.1962 Va 75-1-1 P Thor-DM21 Agena-D with Poppy 1A, Poppy 1B, Surcal 2, Calsphere 1, Wild Bill 2


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