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Title: | Movement of Indian Antarctic station Maitri into auroral oval during geomagnetic disturbance |
Authors: | Banola, S. Dhar, Ajay Rajaram, G. |
Keywords: | Auroral oval Indian Antarctic station Electrojet Auroral field Maitri |
Issue Date: | 1997 |
Citation: | Thirteenth Indian Expedition to Antarctica, Scientific Report, 1997, DOD Technical Publication No.11, p.91-105 |
Abstract: | During the 13th Summer Indian Antarctic Expedition (Dec 1993 - March 1994), fluxgate magnetometers were operated at the Indian Antarctic locations MAITRI (MAI) and DAKSHIN GANGOTRI (DG). The variations of the X, Y, Z geomagnetic components when compared between magnetically Quiet days, moderately Disturbed days, and clearly Disturbed days, indicate that during quiet times, the Indian stations occupy a sub-auroral position; with increasing disturbance, they come into the auroral oval, and then the geomagnetic variations bear the signature of the auroral electrojet (AE) and field-aligned currents (FAC). Ionospheric horizontal current densities in the north-south and east-west directions are estimated from the variations in the geomagnetic components using the Biot-Savart law. They indicate that the current densities over MAI and DG increase with increasing electromagnetic disturbance in geospace, more sharply in the Dawn sector than in the Dusk sector. |
URI: | http://localhost:8080/xmlui/handle/123456789/422 |
Appears in Collections: | UAS_Reprints |
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File | Description | Size | Format | |
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BanolaS_DharA_RajaramG_IndAntarcticExp-13.pdf Restricted Access | 4.68 MB | Adobe PDF | View/Open Request a copy |
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