ARAKS 1975 experiment: Sounding rocket onboard spectral analysis instrumentation

Three separate spectral analysis instruments are described that were flown aboard an Eridan sounding rocket for the Araks experiment. The aim is to preprocess part of the waves generated by electron interaction with the ionosphere. The electron gun is at the lower part of the rocket while the onboard instrumentation is housed in an ejectable nose cone. Two sets of instruments deal with signals from an electric and magnetic antenna in the 7 to 100 MHz range. The third instrument deals with an electric dipole in the 5 to 100 MHz range. It is shown how the amplitude and frequency spectrum are adapted to the telemetry.