Ionospheric slab thickness measurements using GPS satellites in Southern Australia

Goodwin, G.L.; Silby, J. H.; Lynn, K. J. W.; Breed, A. M.; Essex, E. A.

doi:10.1016/s0273-1177(99)80034-9

Cited by 10 publications

(13 citation statements)

References 2 publications

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“…Once the ionogram is made, by stepping through the frequencies from 1 to 20 MHz, Digisonde 256, by means of an in-built Realtime Ionogram Scaler (RIS), and using auto-scaling algorithms that extract the ordinary echo trace from the raw ionogram, determines the relevant ionospheric parameters, such as f o F 2 and N m F 2 (N m F 2 ¼ 1.24 Â 10 10 (f o F 2 ) 2 ) (Bibl et al, 1981;Goodwin et al, 1995). The height h m F 2 of the F 2 layer peak is calculated from the virtual heights with the true height inversion program NHPC .…”

Section: Digisonde 256 Measurementsmentioning

confidence: 99%

Comparison between IRI predictions and digisonde measurements at Tucumán

Ríos

Medina

Álvarez

2007

Journal of Atmospheric and Solar-Terrestrial Physics

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Section: Digisonde 256 Measurementsmentioning

confidence: 99%

Comparison between IRI predictions and digisonde measurements at Tucumán

Ríos

Medina

Álvarez

2007

Journal of Atmospheric and Solar-Terrestrial Physics

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“…EST provides an alternative way to interpret H. Once we have EST, we could estimate H and further the electron density profile. Thus, the spatial, temporal, and solar activity features of EST have been studied worldwide [Breed et al, 1997;Chuo et al, 2010;Dabas et al, 1993;Davies and Liu, 1991;Duarte-Silva et al, 2015;Goodwin et al, 1995aGoodwin et al, , 1995bGulyaeva, 2007;Gulyaeva et al, 2004;Jin et al, 2007;Kenpankho et al, 2011;Kouris et al, 2008;Stankov and Warnant, 2009]. Moreover, geomagnetic storms are also found to influence EST [e.g., Àlàgbé, 2012;Chuo et al, 2010;Gulyaeva, 2007].…”

Section: Introductionmentioning

confidence: 99%

“…Analogously, the station-to-station variation is also true for solar activity influence on EST. Some studies indicate the value of EST is larger under high solar activity level at Lunping and Salisbury [Dabas et al, 1993;Goodwin et al, 1995b], while others depicted a smaller value of EST or insignificant relation between EST and solar activity at both northern and southern hemispheric stations with large latitude intervals [Duarte-Silva et al, 2015;.…”

Section: Introductionmentioning

confidence: 99%

A global picture of ionospheric slab thickness derived from GIM TEC and COSMIC radio occultation observations

et al. 2016

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The ionospheric equivalent slab thickness (EST), defined as the ratio of total electron content (TEC) to F2 layer peak electron density (NmF2), describes the thickness of the ionospheric profile. In this study, we retrieve EST from TEC data obtained from Global Ionospheric Map (GIM) and NmF2 retrieved from Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) ionospheric radio occultation data. The diurnal, seasonal, and solar activity variations of global EST are analyzed as the excellent spatial coverage of GIM and COSMIC data. During solstices, daytime EST in the summer hemisphere is larger than that in the winter hemisphere, except in some high‐latitude regions, and the reverse is true for the nighttime EST. The peaks of EST often appear at 0400 local time. The presunrise enhancement in EST appears in all seasons, while the postsunset enhancement in EST is not readily observed in equinox. Both enhancements are attributed to the more remarkable electron density decay of NmF2 compared to that of TEC. The dependence of EST on solar activity is related to the inconsistent solar activity dependences of electron density at different altitudes. Furthermore, it is interesting that EST is enhanced from 0° to 120°E in longitude and 30° to 75°S in latitude during nighttime, just to the east of Weddell Sea Anomaly, during equinox and the Southern Hemisphere summer. This phenomenon is supposed to be related to the effects of geomagnetic declination‐related plasma vertical drifts.

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“…The only extended measurements of TEC in the southern hemisphere till 1995 were obtained in the present observations. [Goodwin et al, 1992[Goodwin et al, , 1994[Goodwin et al, , 1995a[Goodwin et al, , 1995bBreed et al, 1995aBreed et al, , 1995bBreed et al, , 1995cBreed et al, , 1996Breed et al, , 1997Breed, 1996] [1978]. It is noted that the figures in this paper have y ordinates (indicating TEC) represented by various scales in order that the TEC variations will, for convenience, have similar plotted amplitudes.…”

mentioning

confidence: 92%