Equatorial plasma bubble zonal velocity height gradient from spaced VHF polarimeter and scanning 630 nm measurements
Article first published online: 7 DEC 2012
Copyright 1987 by the American Geophysical Union.
Geophysical Research Letters
Volume 14, Issue 9, pages 965–968, September 1987
How to Cite
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 30 JUL 1987
- Manuscript Received: 15 MAY 1987
Simultaneous measurements of equatorial ionosphere plasma bubble zonal velocities by two different techniques, namely, an east-west spaced vhf electronic polarimeter system and an east-west scan 630nm airglow photometer, carried out over Brazilian low latitude sites, yielded different velocities, but similar local time variation pattern; the polarimeters always measuring higher velocities than the photometer. Based on the difference in the height regions sensitive to the two techniques the results are interpreted as evidence of the presence of a vertical shear in the zonal plasma motion over our low latitude observing site. The results are compared with existing evidences on the velocity shears over the equator as measured by vhf radars and other different techniques. The implications of these results are briefly discussed.