"5"^^ . "Altitude variation of the plasmapause signature in the main ionospheric trough"@en . "Webb, P. A." . "1364-6826" . "The projection of the plasmapause magnetic-field lines to low altitudes, where the light-ion chemistry is dominated by O+, tends to occur near the minimum electron density in the main (midlatitude) electron density trough at night. With increasing altitude in the trough, where H+ emerges as the dominant ion on the low-latitude boundary, we have found cases where the plasmapause fieldlines are located on the sharp low-latitude side of the trough as expected if this topside ionosphere H+ distribution varies in step with the plasmapause gradient in the distant plasmasphere. These conclusions are based on near-equatorial crossings of the plasmapause (corresponding to the steep gradient in the dominant species H+) by the Explorer-45 satellite as determined from electric-field measurements by Maynard and Cauffman in the early 1970s and ISIS-2 ionospheric topside-sounder measurements. The former data have now been converted to digital form and made available at http://nssdcftp.gsfc.nasa.gov."@en . . . . "71" . . "8"^^ . "000271249000009" . "Bilitza, D." . "1"^^ . . . . "[08B59723E6C6]" . "RIV/68378289:_____/09:00338200!RIV10-AV0-68378289" . . . "Truhl\u00EDk, Vladim\u00EDr" . "RIV/68378289:_____/09:00338200" . "Benson, R. F." . . "P(IAA300420603), Z(AV0Z30420517)" . . "Plasmapause; Ionosphere; Midlatitude Trough"@en . "Grebowsky, J. M." . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . . "Altitude variation of the plasmapause signature in the main ionospheric trough" . . "Altitude variation of the plasmapause signature in the main ionospheric trough" . "302584" . "The projection of the plasmapause magnetic-field lines to low altitudes, where the light-ion chemistry is dominated by O+, tends to occur near the minimum electron density in the main (midlatitude) electron density trough at night. With increasing altitude in the trough, where H+ emerges as the dominant ion on the low-latitude boundary, we have found cases where the plasmapause fieldlines are located on the sharp low-latitude side of the trough as expected if this topside ionosphere H+ distribution varies in step with the plasmapause gradient in the distant plasmasphere. These conclusions are based on near-equatorial crossings of the plasmapause (corresponding to the steep gradient in the dominant species H+) by the Explorer-45 satellite as determined from electric-field measurements by Maynard and Cauffman in the early 1970s and ISIS-2 ionospheric topside-sounder measurements. The former data have now been converted to digital form and made available at http://nssdcftp.gsfc.nasa.gov." . . . "Altitude variation of the plasmapause signature in the main ionospheric trough"@en . . "Journal of Atmospheric and Solar-Terrestrial Physics" . "16" . .