Portal de Periódicos da CAPES

Electron Density Distribution and Particle Precipitation in South Atlantic Anomaly: Report on Gyro-Plasma Probe Observation Installed on TAIYO

1979; Society of Geomagnetism and Earth, Planetary and Space Sciences; Volume: 31; Issue: Supplement Linguagem: Inglês

10.5636/jgg.31.supplement_s95

2185-5765

Hiroshi Oya, Tadatoshi Takahashi, Akira Morioka,

Solar and Space Plasma Dynamics

Analyses have been made on the electron density and ion sheath capacity data obtained by gyro-plasma probe installed on TAIYO. The data for 160 orbits provide various states of the electron density profile in the ionosphere, such as the local time dependence and the equatorial anomaly. The measured impedance values at 406kHz reveals the ion sheath thickness surrounding the probe. In the region of the South Atlantic anomaly of the geomagnetic field, quick changes of the ion sheath capacitance have been observed indicating charging up of the probe. These quick changes are separated into two types; the first is the quick sharp variation and the second is the gradual variation. The sharp variation of the sheath capacitance value is disclosed to be triggered by the telemetry radio wave in the region of the South Atlantic anomaly.