Abstract
High time resolution electron and ion measurements aboard a sounding rocket reaching an altitude of 1100 km have revealed hundreds of localized regions of intense lower hybrid waves and transversely accelerated H+ and O+ ions (TAI). From the nature of the correlations between the TAI and the waves it is concluded that the waves are accelerating the ions within localized regions of transverse scale length of 50 to 100 m and that these acceleration regions are thin filaments with lengths the order of a few hundred kilometers. The TAI fluxes are adequate to explain ISIS satellite observations of TAI. The TAI occur during periods of field-aligned electron precipitation.
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