Структура и динамика полярных токовых систем : материалы международного симпозиума «Полярные геомагнитные явления», 25-31 мая, Суздаль, СССР / Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т. – Апатиты : [б. и.], 1988.

like motion at the LLBL/PS interface is responsible for theae observations. 4. The computed, potential drop across one of the narrow arcs observed the ionosphere results in a value of 0.8 kV, about a factor of two less than that developed at the LLBL, The field-aligned potential available for accel eration of precipitating, electrons was thus about 1 kV, nearly equal to the measured energy peak of electrons within the observed narrow arc. These low altitude observations made by HILAT are consistent with the suggestion that wave-like motion of the LLBL/PS interfuce is one possible generator of small-scale magnetic and electric field structure and auroral emissions near the poleward edge of the auroral oval. A likely candidate for the source of these waves is the Kelvin-Helmholtz instability. ACKNOWLEDGEMENTS. We wish to thank the Defense Nuclear Agency and the U.3, Air Force Space Division Space Test Program for their continuing support of the HILAT program. A portion of this work was completed while Dr.Bythrow was on duty with the USAF Reserves at AFGL. R E F E R E N C E S s Bythrow P. F . , Heelis R.A., Hanson W.B., Power R.A. Observational evidence for a boundary layer source of dayside region I field-aligned currents, J.Geophys.Res., 86, 5577, 1981. Cowley S.W.H., Southwood D.J., Saunders 1Д.А. Interpretation of magnetic field perturbations in the Earth's magnetopause boundary layer. - Planet. Space Sci., 21» 1273, 1983. Doyle M.A., Burke W.J., Hardy D . A . , Bythrow P . F . , Rich F . S . , Potemra T.A. A 3imple model of auroral electrodynamics compared with HILAT measurements, submitted to J.Geophys.Res., August 1985. Eastman T. E . , Hones E . W . , Jr., Bame S.J., Asbridge J.R. The magneto- spheric boundary layert Site of plasma, momentum and energy transfer from the magnetosheath into the magnetosphere. - Geophys.Res.Lett., 685, 1976. Fairfield D . H . , Mead G.D. Magnetospheric mapping with a quantitative geomagnetic field model. - J.Geophys.Res., 80, 535, 1975. Fremouw E.J. et al. The HILAT Program. - EOS Trans.AGU, 6£, 163, 1983. Hanson W.B., Heelis R.A. Techniques for measuring bulk gas motion from satellites. - Space Sci.Inatrum,, 1_» 493, 1975. Hanson W.B., Zuccaro D . R . . Lippincott C . R . , Sanatani S. The retarding potential analyser on Atmospheric Explorer. - Radio Sci., 8, 333, 1973. Heelis R.A., Winningham J.D., Hanson W.B., Burch J.L. The relationships between high-latitude convection reversals and the energetic particle morphology observed by Atmospheric Explorer. - J.Geophys.Res., 8£, 3315,1980. Hones E . W . , Jr., B i m J., Bame S . J . , Asbridge J. R , , Pashmann G», Sckopke N., Haerendel G. Further determination of the characteristics of magnetospheric plasma vortices with ISEE 1 and 2. - J.Geophys.Res., 86, Lee L.C., Albano R . K . , Kan J.R. Kelvin—Helmholtz instability in the magnetopause-boundary layer region. - J.Geophys.Res., 86, 54, 1981. Lundin R . , Evans D.S, Boundary layer plasma as a source for high latitude, early afternoon auroral arcs, - Planet.Space Sci., Q , 1389, 1985. Meng C.-I., Huffman R.E. Ultraviolet imaging from space of the aurora under full sunlight. - Geophys.Res.Lett., j., 3 1 5 , 1984. HcDlarmid I.B., Burrows J.R., Wilson H.D. Comparison of magnetic field perturbations at high latitudes with charged particle and IMF measurements. - J.Geophys.Res., ВЦ, 681, 1978. 56