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The distribution of electrons in the lower and middle ionosphere R W Knecht
A survey of topside sounding of the ionosphere J H Chapman
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absorption Alouette anomaly Atmos auroral Belrose boundary C. O. Hines Chapman and Ferraro charged particle component COSPAR curve D-region D-region electron density deduced discussed distribution of electrons diurnal drift dynamo theory dynamo-region earth edited effects electric field electrojet electron density profile emission equator equatorial profile erg cm-2 Exosphere F-layer Fejer field lines flux geomagnetic field Geophys ground-based high latitudes hydromagnetic ibid increase Inst ionization ionograms ionosonde ionosphere IQSY irregularities J. A. Ratcliffe Japan K. I. Gringauz Knecht magnetic field magnetosphere Matsushita maximum Mc/s measurements motion neutral gas observed obtained Oxford oxygen peak Pergamon photosynthesis Phys plasma frequency plasma spikes polar probe Proc Ratcliffe recent region Rept rocket experiments satellite scale height shown in Fig shows Smith solar cycle solar flares solar plasma solar stream sporadic-E stations studies suggested sunspot temperature Terr theoretical topside sounder upper atmosphere velocity Vestine whistler wind wind shears X-rays