Recent studies of the structure and morphology of auroral zone F region irregularities
Article first published online: 7 DEC 2012
Copyright 1983 by the American Geophysical Union.
Volume 18, Issue 6, pages 1167–1180, November-December 1983
How to Cite
1983), Recent studies of the structure and morphology of auroral zone F region irregularities, Radio Sci., 18(6), 1167–1180, doi:10.1029/RS018i006p01167., , , , , , , , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 3 MAR 1983
- Manuscript Received: 25 NOV 1982
Recent analyses of auroral-zone spaced-receiver measurements have shown that the regions where sheetlike irregularities occur are confined to the equatorward portion of the nighttime scintillation zone where the westward and eastward electrojets flow. Poleward of this region, the irregularities are rodlike. For satellites in highly eccentric orbits, the spaced-receiver technique can be used to measure ionospheric drifts. Simultaneous incoherent-scatter radar measurements have revealed two types of F region ionization enhancements that are believed to be the source regions of persistent scintillation features on polar satellite transmissions. One type is found at the equatorward edge of the diffuse aurora and can persist for more than 10 hours. More dynamic structures often occur in pairs, which suggests an association with ‘inverted-V’ precipitation events. Radar data have also revealed large-scale east-west structure in the poleward enhancements.