Substorm Observations by Sounding Rockets and by Reception of Polar-Orbitting Satellite Data

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Comprehensive studies of the polar substorm phenomena could be accomplished by expanding the observation network horizontally by setting arrays of unmanned observatories and vertically by use of balloons, sounding rockets and scientific satellites. For example of the research coordination between ground-based observatories and sounding rockets, 15 examples of the electron number density profile measured by rockets at Syowa Station in Antarctica are compared with the ground-based observation data. It seems that the auroral ionization by soft precipitating auroral electrons of exp (-E/2 keV) in energy spectrum takes place only within auroral arcs, whereas the D-region ionization by hard electrons (>30 keV) is not localized within the auroral arcs. Satellite data receiving facilities for ISIS-I and -II, INJUN-6,NOAA-III and -IV, ATS-6,EXOS-A and -B have been built at Syowa Station in Antarctica to carry out a continuous observation in coordination with ground-based and rocket-borne measurements. The tracking and receiving capability of the constructed receiving system is represented by preliminary experimental data that over 60 dB of signal-to-noise ratio is maintained above the threshold level for the tracking range over (10)^4km.
国立極地研究所の論文