Download or read book Study of the Equatorward Edge of the Auroral Oval from Satellite Observations written by B. S. Dandekar and published by . This book was released on 1979 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The auroral ovals in the northern and southern hemispheres observed by the optical instruments aboard the DMSP satellites are studied on a statistical basis in terms of the temporal, spatial, and magnetic activity dependence of the equatorward edge of the diffuse (continuous) aurora. In the nightside (18-08 CGT), the equatorward edges of the auroral ovals are located predominantly in the latitude range 61 deg - 69 deg CGL. They show strong dependence on the levels of magnetic activity. Of the indices Kp, AE, Dst, and Q, the Q index is correlated best with the position of the equatorward edge of the diffuse aurora. Assuming that the auroral oval is approximately circular in a CG coordinate system, the dependence of the radius of the auroral oval on magnetic activity is determined. The radius and the center of the auroral circle changes with variation in magnetic activity. The ovals of the northern and southern hemispheres consistently show an asymmetry. On the nightside, the oval in the southern hemisphere is located about 1 deg closer to the equator than the oval in the northern hemisphere.