A statistical study of ionospheric profile parameters derived from Millstone Hill incoherent scatter radar measurements

Lei, Jiuhou

doi:10.1029/2004gl020578

Cited by 42 publications

(44 citation statements)

References 16 publications

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“…It was found, however, that both model options have their shortcomings as was shown by Lee & Reinisch (2006) (2000) model generally providing better results during daytime, while the Gulyaeva (1987) model performed better during nighttime. This was also confirmed by Lei et al (2004) with Millstone Hill incoherent scatter data. Additionally, like the ionosonde comparisons they found that for B 1 diurnal variations are well represented by the Bilitza et al (2000) model.…”

Section: Electron Densitysupporting

confidence: 66%

The International Reference Ionosphere 2012 – a model of international collaboration

Bilitza

Altadill²,

Zhang

et al. 2014

J. Space Weather Space Clim.

555

347

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The International Reference Ionosphere (IRI) project was established jointly by the Committee on Space Research (COSPAR) and the International Union of Radio Science (URSI) in the late sixties with the goal to develop an international standard for the specification of plasma parameters in the Earth's ionosphere. COSPAR needed such a specification for the evaluation of environmental effects on spacecraft and experiments in space, and URSI for radiowave propagation studies and applications. At the request of COSPAR and URSI, IRI was developed as a data-based model to avoid the uncertainty of theory-based models which are only as good as the evolving theoretical understanding. Being based on most of the available and reliable observations of the ionospheric plasma from the ground and from space, IRI describes monthly averages of electron density, electron temperature, ion temperature, ion composition, and several additional parameters in the altitude range from 60 km to 2000 km. A working group of about 50 international ionospheric experts is in charge of developing and improving the IRI model. Over time as new data became available and new modeling techniques emerged, steadily improved editions of the IRI model have been published. This paper gives a brief history of the IRI project and describes the latest version of the model, IRI-2012. It also briefly discusses efforts to develop a real-time IRI model. The IRI homepage is at http://IRImodel.org.

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Section: Electron Densitysupporting

confidence: 66%

The International Reference Ionosphere 2012 – a model of international collaboration

Bilitza

Altadill²,

Zhang

et al. 2014

J. Space Weather Space Clim.

555

347

View full text Add to dashboard Cite

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“…The high and low values are depicted by the solid and dashed contours, respectively. Diurnal behavior of B 0 during winter and equinox (from September to March) is characterized by so called morning and evening collapses (Lei et al, 2004) 02 LT) seasonal variations also show an annual pattern with the May minimum (63 km) and the November maximum (75 km). In general, diurnal-seasonal pattern of B 0 is close to that at Millstone Hill (Lei et al, 2004).…”

Section: B 0 Morphologymentioning

confidence: 99%

“…Millstone Hill data (Lei et al, 2004) suggest that increase of solar activity level from low (F 10.7 = 90 s.f.u.) to high (F 10.7 = 180 s.f.u.)…”

Section: B 0 Morphologymentioning

confidence: 99%

“…results in increase of B 0 by about 30% during the night and by about 20% during the day, except for the morning collapse periods in equinox and winter when B 0 increases by less than 10%. In order to compare these observations with LEMI, we had to regroup and average our data to match Lei et al (2004) technique of binning data into three seasons, namely summer (May-August), winter (November-February), and equinox (March, April, September and October). We averaged the LEMI and IRI mean nighttime (22-02 LT) and mean daytime (10-14 LT) values of B 0D over the three seasons.…”

Section: B 0 Morphologymentioning

confidence: 99%

“…The following sections compare the LEMI diurnal, seasonal, and solar activity behavior with the IRI-2007 (Bilitza and Reinisch, 2008) prediction and with long-term observational data from the Millstone Hill (42.6N, 288.5E) incoherent scatter radar , the co-located ionosonde (1989)(1990)(1998)(1999)(2000)(2001)(2002)(2003)(2004) (Lei et al, 2004(Lei et al, , 2005, and other instruments. Comparison of LEMI with data from a different mid-latitude location allowed us to identify the longitudinal differences in the local ionospheric specifications.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Local empirical model of ionospheric plasma density derived from Digisonde measurements at Irkutsk

Ratovsky

Oinats

2011

Earth Planet Sp

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Ionogram data from routine ionospheric observations in Irkutsk, Russia using a DPS-4 Digisonde sounder were hand-scaled for the 6-year period from December 2002 to December 2008 to derive a local empirical model of the electron density distribution in the bottomside ionosphere that provides a comprehensive description of the diurnal, seasonal, and solar activity variations of the major ionospheric characteristics. The paper describes the technique for building the local empirical model and the results of comparing its diurnal, seasonal, and solar activity specifications with the standard IRI-2007 climatological model for the same period of time, and retrospective observational data from the Millstone Hill incoherent scatter radar and a collocated Digisonde (1989Digisonde ( -1990Digisonde ( , 1998Digisonde ( -2004. Reasoning for the observed differences between the three datasets is then provided in terms of background physical phenomena. Primary focus of the paper is the behavior of three F 2 layer characteristics: the F 2 peak density (N m F 2 ), the peak height (h m F 2 ) and the bottomside thickness (B 0 ).

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On the performance of the IRI‐2012 and NeQuick2 models during the increasing phase of the unusual 24th solar cycle in the Brazilian equatorial and low‐latitude sectors

Venkatesh

Fagundes

Seemala³

et al. 2014

JGR Space Physics

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It is known that the equatorial and low-latitude ionosphere is characterized with typical dynamical phenomena namely, the equatorial ionization anomaly (EIA). Accurate modeling of the characteristic variations of the EIA is more important to arrive at the correct estimation of range delays required for the communication and navigation applications. The total electron content (TEC) data from a chain of Global Positioning System (GPS) receivers at seven identified locations from equator to the anomaly crest and beyond along 315°E geographic longitude in the Brazilian sector are considered. The performances of the latest available IRI-2012 and NeQuick2 models have been investigated during 2010-2013 in the increasing phase of the 24th solar cycle. A comparative study on the morphological variations of the GPS measured and modeled TEC revealed that the performances of the models are improved during low solar activity periods compared to that during the increased solar activity years. The strength and the locations of the EIA crest are nearly well represented by both the models during the low solar activity while the models underestimate the peak TEC at the EIA during the increased solar activity conditions. The deviations between the GPS-measured and model-derived TEC are more during equinoctial and summer months at and around the anomaly crest locations. Significant differences have also been observed in between the TEC values derived from both the models. The causes for the discrepancies in the modeled TEC values are discussed based on the model-derived and ionosonde-measured vertical electron density profiles variations.

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A statistical study of ionospheric profile parameters derived from Millstone Hill incoherent scatter radar measurements

Cited by 42 publications

References 16 publications

The International Reference Ionosphere 2012 – a model of international collaboration

The International Reference Ionosphere 2012 – a model of international collaboration

Local empirical model of ionospheric plasma density derived from Digisonde measurements at Irkutsk

On the performance of the IRI‐2012 and NeQuick2 models during the increasing phase of the unusual 24th solar cycle in the Brazilian equatorial and low‐latitude sectors

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