STUDY OF VLF RADIATION BY USE OF A NIKECAJUN ROCKET.
CENTRE NATIONAL D'ETUDES DES TELECOMMUNICATIONS ISSY-LES-MOULINEAUX (FRANCE)
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The payload of a NIKE CAJUN rocket launched at Wallops Virginia consisted of equipment developed to measure the magnetic field in the ionosphere of a VLF wave radiated by the Annapolis transmitter NSS on 22,3 kcs. After the measurement principles have been exposed, a detailed description of the equipment is given and the telemetry results are analysed. In spite of an antenna effect on the loops, an approximate measure of the VLF field in the whistler mode between the D and E layers is given. An analysis of the propagation above Wallops-Island is carried out, which allows the development of the processing of the Doppler effect observed on the VLF wave received in the ionosphere. The electron density profile obtained between 70 and 100 km is analysed and shows two layers at 78 and 87 km. Author