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The relationship between the harang discontinuity and the substorm injection boundary |
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| Authors: | Asgeir Brekke |
| Institution: | The Auroral Observatory, The University of Tromsø, P.O. Box 953, N-9001, Tromsø, Norway |
| Abstract: | A correlative study of characteristic features observed in the ATS-5 particle data, in the Chatanika electric field and ionospheric conductivity data has been performed. It is found that distinct variations in the electric field are observed at Chatanika at the onset of a precipitation event at geostationary orbit. This is probably the effect of the transient electric field inferred by McIlwain (1973). A turn in the meridional component from north to south is observed at Chatanika at about the same local time as the ATS-5 satellite is crossing the injection boundary. This turn in the electric field at Chatanika which is also related to strong particle precipitation is probably due to the crossing of the Harang discontinuity. |
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