Comparison of model and experimental ionospheric parameters at high latitudes

Maltseva, O. A.; Mozhaeva, N.S.; Nikitenko, Tatyana

doi:10.1016/j.asr.2012.04.009

Cited by 19 publications

(16 citation statements)

References 30 publications

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“…This study undertakes a thorough evaluation of key IRI parameters including F 2 peak electron density (NmF 2 ), F2 peak height (hmF 2 ), M(3000)F 2 propagation factor, bottomside thickness (B0), and topside thickness. There have been several studies that have evaluated the performance of IRI hmF 2 and NmF 2 products in midlatitude and low-latitude regions [Sethi et al, 2008;Ehinlafa et al, 2010;Ezquer et al, 2011;Bilitza et al, 2012;Wichaipanich et al, 2012], but only a select few have attempted to do so in high-latitude regions [Oyeyemi et al, 2010;Ezquer et al, 2011;Magdaleno et al, 2011;Maltseva et al, 2013], none of which have been within the polar cap or at magnetic latitudes as high as what we shall be considering in this study. The performance of the IRI bottomside thickness models has been evaluated mainly in equatorial and midlatitude regions [Sethi and Mahajan, 2002;Blanch et al, 2007;Adeniyi et al, 2008;McKinnell et al, 2009;Lee and Reinisch, 2012], where virtually no evaluation has been undertaken at high latitudes.…”

Section: Introductionmentioning

confidence: 99%

A top to bottom evaluation of IRI 2007 within the polar cap

et al. 2014

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Monthly median values of ionospheric peak height (hmF 2 ) and density (NmF 2 ), derived from ionosonde measurements at four Canadian High Arctic Ionospheric Network (CHAIN) stations situated within the polar cap and Auroral Oval, are used to evaluate the performance of the International Reference Ionosphere (IRI) 2007 empirical ionospheric model during the recent solar minimum between 2008 and 2010. This analysis demonstrates notable differences between IRI and ionosonde NmF 2 diurnal and seasonal behavior over the entire period studied, where good agreement is found during summer periods but otherwise errors in excess of 50% were prevalent, particularly during equinox periods. hmF 2 is found to be marginally overestimated during winter and equinox nighttime, while also being underestimated during summer and equinox daytime by in excess of 25%. These errors are shown to be related to significant mismodeling of the M(3000)F 2 propagation factor. The ionospheric bottomside thickness parameter (B0) is also evaluated using ionosonde measurements. It is found that both of the IRI's internal B0 models significantly misrepresent both seasonal and diurnal variations in bottomside thickness when compared to ionosonde observations, where errors at times exceed 40%. A comparison is also presented between IRI and Resolute (74.75N, 265.00E) Advanced Modular Incoherent Scatter Radar (AMISR)-derived topside thickness. It is found in this comparison that the IRI is capable of modeling ionospheric topside thickness exceptionally well during winter and summer periods but fails to represent significant diurnal variability during the equinoxes and seasonal variations.

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Section: Introductionmentioning

confidence: 99%

A top to bottom evaluation of IRI 2007 within the polar cap

et al. 2014

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“…Earlier studies [18][19][20] have shown that such use allows us to improve significantly the correspondence between the calculated and observational values of foF2 results have been obtained according to the European stations. Occurrence of new ionospheric stations in 2013-2014 allows to estimate efficiency of (med) on a global scale.…”

Section: Discussionmentioning

confidence: 99%

“…TEC is measured in TEC Units (TECU), where 1TECU = 10 16 electrons/m 2 . Results of papers [18,20] showed that in most cases the best correspondence with experimental foF2 values is provided by (JPL) for map JPL; however there can be separate regions or time periods when another map provides the best conformity with experimental data.…”

Section: Observational Datamentioning

confidence: 99%

“…It is possible to point out the model developed for the European region for the noon and midnight values as linear functions = * + [30,31]. Factors and of these functions are given in [20] in the form of tables for four years (1996, 1999, 2000, and 2004). According to European GPS stations, in [31] linear dependence of TEC on solar activity has been found in quiet conditions ( ]): = * (cos 12 ) , where cos 12 is cosine of zenith angle in the noon representing seasonal parameter.…”

Section: On the Possible Global Model Of The Equivalent Slab Thicknesmentioning

confidence: 99%

“…In [19] an attempt is done to use experimental information concerning to determine foF2 from the TEC, in particular, the optimal constant and the expression of foF2 = √TEC with a constant were introduced. However in [20] it is shown that results of such approach are worse than for (med). The most comprehensive research was performed in [21].…”

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Obtaining Ionospheric Conditions according to Data of Navigation Satellites

Maltseva

Mozhaeva

2015

International Journal of Antennas and Propagation

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Defining ionospheric conditions, the deviation of the observational value of the total electron content TEC(obs), measured by means of navigation satellites, from a median is a bench mark. According to more than 40 ionospheric stations during April 2014 it is shown that synchronism of change of deviations of TEC and critical frequency foF2 of the ionosphere is kept under quiet and moderate disturbed conditions. This fact allows to use a median of the equivalent slab thicknessτ(med) as a reliable calibration factor to calculate foF2 from TEC(obs). The efficiency coefficient of joint use ofτ(med) and TEC(obs) changes from 1.5 to 4 with average value 2.2 across the globe. The highest coefficient corresponds to middle latitudes, however the estimations obtained for high- and low-latitude areas indicate possibility to useτ(med) and TEC(obs) in these areas.

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