Radio tomographic imaging as an aid to modeling of ionospheric electron density

Dabas, R. S.; Kersley, L.

doi:10.1029/2001rs002514

Cited by 12 publications

(13 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the resultant equations have had only limited application because of the wide day‐to‐day variability in the location and form of the feature. More recently, the radio tomography technique has been shown to be particularly adept at imaging the large‐scale horizontal spatial structure of the trough [ Pryse et al , 1993; Kersley et al , 1997; Dabas and Kersley , 2003; Pryse , 2003], a success that has been exploited here in the characterization of the form of the structure by means of a number of carefully defined parameters.…”

Section: Introductionmentioning

confidence: 99%

Parameterization of the main ionospheric trough in the European sector

et al. 2006

Self Cite

View full text Add to dashboard Cite

Pryse, Sian; Kersley, L.; Malan, D.; Bishop, G. J., 'Parameterization of the main ionospheric trough in the European sector, Radio Science (2006) 41 pp.RS5S14 RAE2008Measurements of total electron content, obtained by monitoring satellite transmissions at stations in the United Kingdom during a period of 12 months, have been used to characterize the structure and dynamics of the main ionospheric trough in terms of a set of defined parameters. The primary aim of the investigation was to represent the position and shape of the trough in such a way that the experimental observations can be used for direct comparison and validation of ionospheric models.Peer reviewe

show abstract

Section: Introductionmentioning

confidence: 99%

Parameterization of the main ionospheric trough in the European sector

et al. 2006

Self Cite

View full text Add to dashboard Cite

show abstract

“…It has been shown that radio tomography has an important role to play in the validation of ionospheric models, not only the empirical and parameterized types used for the mitigation of propagation effects on practical radio systems [ Dabas and Kersley , 2003], but also the first‐principles models based on solution of the underlying physical equations of the coupled ionosphere and thermosphere [ Idenden et al , 1998]. While the earlier study was confined to comparisons with observations from a single chain of stations, the results presented here demonstrate the potential of using observations from multiple stations in the validation of the wider geographic aspects of the model behavior.…”

Section: Discussionmentioning

confidence: 99%

Radio tomographic imaging of the northern high‐latitude ionosphere on a wide geographic scale

et al. 2005

Self Cite

View full text Add to dashboard Cite

[1] Several chains of receivers, measuring total electron content (TEC) during passes of satellites in the U.S. Navy Ionospheric Measuring System (NIMS), are operated at northern high latitudes by members of the International Ionospheric Tomography Community (IITC). Results are presented here of nearly simultaneous latitude-altitude images of the ionosphere over Scandinavia, Greenland, and Alaska, generated from IITC data obtained on 20 September 2001 and interpreted in the context of an IMF-dependent convection model. The images are compared with output from a coupled thermosphere-ionosphere-plasmasphere model and also with maps of high-latitude TEC generated from GPS measurements. With B z and B y both weakly negative, the images and map reveal plasma features of a two-cell convection pattern rotated slightly to earlier local magnetic times. The tomographic images provide details of map features such as a tongue of ionization created by solar EUV radiation on the dayside and entrained by convection into the polar cap from the western Russian sector. Combining latitude versus altitude tomographic images generated in different longitudinal sectors from polar-orbiting beacon satellites such as those of NIMS with TEC maps from GPS offers an emerging opportunity for polar aeronomic studies, especially if further related to synoptic convection measurements. The results also demonstrate the potential role of wide-scale radio tomography in the verification of ionospheric models.Citation: Kersley, L., S. E. Pryse, M. H. Denton, G. Bust, E. Fremouw, J. Secan, N. Jakowski, and G. J. Bailey (2005), Radio tomographic imaging of the northern high-latitude ionosphere on a wide geographic scale, Radio Sci., 40, RS5003,

show abstract

“…There are many techniques used to probe the ionosphere that includes the earth based radio techniques: vertical sounders, incoherent scatter radar, etc., as well as space-based techniques: Geostationary satellites, GPS satellites, LEO satellites and in situ measurements. Ionospheric scientists are also using new techniques such as computed tomography [6][7][8] , occultation [9,10] and University of New Brunswick (UNB) ionospheric modeling technique [11] .…”

Section: Total Electron Content (Tec)mentioning

confidence: 99%

Leveling Process of Total Electron Content (TEC) Using Malaysian Global Positioning System (GPS) Data

Norsuzila¹,

Abdullah²,

Ismail³

2008

American J. of Engineering and Applied Sciences

View full text Add to dashboard Cite

The signals from the satellites of the Navstar Global Positioning System (GPS) travel through the earth's ionosphere on their way to GPS receivers. However, ionospheric delay is one of the main sources of error in GPS. The magnitude of the ionospheric delay is influenced by the Total Electron Content (TEC) along the radio wave path from a GPS satellite to the ground receiver. This study investigates the TEC using GPS data collected from Wisma Tanah, Kuala Lumpur, KTPK (3° 10' 15.44"N, 101° 43' 03.35"E) station and processed and analyzed under quiet geomagnetic day at the equatorial region on 8 November 2005. This research assesses the errors translated from the code-delay to the carrier-phase ionospheric observable by the so-called leveling process, which was applied to reduce multipath from the data. It was found that the leveled carrier-phase ionosphere observable was affected by a systematic error, produced by code-delay multipath through the leveling procedure. The effects, however, do not cancel after averaging all the data. Dual frequency carrier-phase and code-delay GPS observations are combined to obtain ionospheric observable related to the slant TEC (TECs) along the satellite-receiver line of sight (los). This results in the absolute differential delay and the remaining noise was discarded. These are the first results obtained using TEC-GPS technique for TEC measurement in Malaysia

show abstract

Radio tomographic imaging as an aid to modeling of ionospheric electron density

Cited by 12 publications

References 11 publications

Parameterization of the main ionospheric trough in the European sector

Parameterization of the main ionospheric trough in the European sector

Radio tomographic imaging of the northern high‐latitude ionosphere on a wide geographic scale

Leveling Process of Total Electron Content (TEC) Using Malaysian Global Positioning System (GPS) Data

Contact Info

Product

Resources

About