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Daytime-aurora; space-weather; auroral photometry; plasmapause related processes

The first optical signatures of plasmapause associated processes were gleaned from the daytime auroral emissions monitored from Maitri, the Indian station in Antarctica, using the newly built, ground-based, Multiwavelength Daytime Photometer (MWDPM). The plasmapause boundary inferred from these measurements conforms well with the known empirical relationship with the geomagnetic indexKp. The measurements made at 391.4, 486.1, 557.7 and 630.0 nm emissions revealed significant day-to-day variations in their spatial and temporal extents. These preliminary results are presented and discussed.

D Pallam Raju¹ R Sridharan¹

1. Physical Research Laboratory, Navrangpura, Ahmedabad - 380009, India

Published

September 1998

Manuscript received

24 June 1998

Manuscript revised

28 July 1998