[PDF] Top 20 Density enhancements associated with equatorial spread
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Density enhancements associated with equatorial spread
... of equatorial spread-F (ESF) plumes are examined using the NRL SAMI3/ESF three-dimensional simulation ...the equatorial ionization anomaly (IA), density crests within the plume occur where ... See full document
11
Equatorial spread fossil plumes
... Electron density versus longitude and latitude at a constant altitude of 288 km at various ...high density regions within an ESF plume (see Krall et ... See full document
11
Geomagnetic storm and equatorial spread-F
... Strong sporadic E, inhibiting the appearance of the F-layer traces on ionograms was observed at PAL only for a short spell between 01:50 to 02:00 LT. Figure 6 shows a few iono- grams from both PAL and SJC on this night. ... See full document
9
Equatorial Spread F structures and associated airglow intensity variations observed over Gadanki
... The interesting point emerges using bi-directional airglow measurements that the slant columnar airglow intensities, in spite of geometrical advantages, on occasions, are found to be less than the corresponding zenith ... See full document
11
Equatorial spread F structures and associated airglow intensity variations observed over Gadanki
... The interesting point emerges using bi-directional airglow measurements that the slant columnar airglow intensities, in spite of geometrical advantages, on occasions, are found to be less than the corresponding zenith ... See full document
11
Upwelling: a unit of disturbance in equatorial spread F
... A question that remains, is why do we observe small- scale irregularities (< few km) along the west wall of an upwelling, at a time when EPBs appear to be sup- pressed? One possibility is that the vector direction of the ... See full document
14
Characterization of VHF radar observations associated with equatorial Spread F by narrow-band optical measurements
... of equatorial Spread F (ESF) ...are associated with large-scale irregu- lar plasma structures and found to be in correspondence with the “plume” structures obtained by VHF ...plasma ... See full document
8
Ionospheric coupling, especially between ionogram-recorded spread-F and sporadic-E enhancements at an equatorial-anomaly crest station, Chung-Li
... [ 11 ] The scaling of ionograms involves recording hourly values of a number of ionospheric parameters. In addition so-called f-plots are made which display graphically some of these parameters at 15 minute intervals, ... See full document
6
Effect of equatorial ionization anomaly on the occurrence of spread-F
... the equatorial ionosphere coupled with the E– W electric field causes the equatorial ionization anomaly (EIA) and equatorial spread-F ...the associated processes on the occurrence of ... See full document
8
Bottom-type scattering layers and equatorial spread F
... bottomside equatorial F-region has a broad maximum centered on wavelengths of about 1 ...coefficient associated with the kilomet- ric irregularities could be five orders of magnitude greater than the ... See full document
9
Multistation digisonde observations of equatorial spread in South America
... Received: 8 December 2003 – Revised: 23 April 2004 – Accepted: 18 May 2004 – Published: 23 September 2004 Part of Special Issue “Equatorial and low latitude aeronomy” Abstract. Directional ionogram and F -region ... See full document
9
ANGEO - Non-trough foF2 enhancements at near-equatorial dip latitudes
... peak density which did not appear in 1966, and which passed unnoticed in other published ...the equatorial crest and dome morphology, and present their main LT and seasonal ...mid-morning ... See full document
10
Observations in equatorial anomaly region of total electron content enhancements and depletions
... A comparison of TEC in Figs. 3 and 4 reveals its shape and value to be nearly the same from about 14:00 UT to 15:30 UT. As is the case in Fig. 3, a series of depletions also appear between 15:30 UT and 17:00 UT in Fig. ... See full document
8
Multistation digisonde observations of equatorial spread F in South America
... Received: 8 December 2003 – Revised: 23 April 2004 – Accepted: 18 May 2004 – Published: 23 September 2004 Part of Special Issue “Equatorial and low latitude aeronomy” Abstract. Directional ionogram and F -region ... See full document
10
Radar and satellite investigations of equatorial evening vertical drifts and spread
... The results also show that a positive mean drift value around 18:00 or 18:30 LT is a necessary, but not sufficient condition for the development of topside ESF. We found, for instance, a case where the mean vertical ... See full document
10
Spread F – an old equatorial aeronomy problem finally resolved?
... study spread F, including neutral ...integrated density along the magnetic field lines and the stabilizing conductivi- ties at their ...when Spread F is going to occur or not, or at least compare, ... See full document
20
Possible ionospheric preconditioning by shear flow leading to equatorial spread
... topside spread F occurred later. They associated the cluster- ing with a horizontal wave in the background plasma density that would present alternately stable and unstable horizontal gradients for ... See full document
9
A statistical study of satellite traces and evolution of equatorial spread F
... altitude of 3-MHz reflections and the corresponding vertical drifts during 18 to 22 IST for the nights when ST occurred before 22 IST. Figure 12a,b shows the virtual height of the 3-MHz reflections and the corresponding ... See full document
13
Response of the equatorial electrojet to solar flare related X ray flux enhancements
... Fig. 11. Daytime variations of backscattered power at six altitudes in the range of 94–107 km on 08 July 1992. elemental length of the geomagnetic fileld line along which integration is carried out from an altitude in the ... See full document
12
Three-dimensional simulation of equatorial spread-F with meridional wind effects
... Specifically, V ns acts through Eqs. (1) and (2), to redistribute the plasma, leading to interhemispheric asymmetries in the electron distribution and the Pedersen conductivity. In this study, where the winds are ... See full document
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