Charging of the impedance-probe by the auroral energetic electrons

Three antarctic rockets S-310JA-3, 5 and 6 were launched at Syowa Station into the auroral ionosphere. Charging of the electrode caused by the energetic electrons precipitated from the magnetosphere was observed in the frequency spectra of the impedance-probe. The measurement of the probe capacitance shows that the ion sheath thickness around the probe increases with enhanced energetic electron flux