Fig. 8From: Sheath capacitance observed by impedance probes onboard sounding rockets: Its application to ionospheric plasma diagnosticsObserved spectra of the equivalent probe capacitance. (a) Measurement at 279.3 km altitude in a condition of fpe = 4.51 MHz and fce = 1.11 MHz, (b) measurement at 150.2 km altitude in a condition of fpe = 0.58 MHz and fce = 1.20 MHz.Back to article page