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  • Chartier_et_al-2014-Radio_Science

    Rights statement: ©2013. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. 0048-6604/14/10.1002/2013RS005238

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Ionospheric imaging in Africa

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Ionospheric imaging in Africa. / Chartier, Alex T.; Kinrade, Joe; Mitchell, Cathryn N.; Rose, Julian A. R.; Jackson, David R.; Cilliers, Pierre; Habarulema, John-Bosco; Katamzi, Zama; Mckinnell, Lee-Anne; Matamba, Tshimangadzo; Opperman, Ben; Ssessanga, Nicholas; Giday, Nigussie Mezgebe; Tyalimpi, Vumile; De Franceschi, Giorgiana; Romano, Vincenzo; Scotto, Carlo; Notarpietro, Riccardo; Dovis, Fabio; Avenant, Eugene; Wonnacott, Richard; Oyeyemi, Elijah; Mahrous, Ayman; Tsidu, Gizaw Mengistu; Lekamisy, Harvey; Olwendo, Joseph Ouko; Sibanda, Patrick; Gogie, Tsegaye Kassa; Rabiu, Babatunde; De Jong, Kees; Adewale, Adekola.

In: Radio Science, Vol. 49, No. 1, 17.03.2014, p. 19-27.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Chartier, AT, Kinrade, J, Mitchell, CN, Rose, JAR, Jackson, DR, Cilliers, P, Habarulema, J-B, Katamzi, Z, Mckinnell, L-A, Matamba, T, Opperman, B, Ssessanga, N, Giday, NM, Tyalimpi, V, De Franceschi, G, Romano, V, Scotto, C, Notarpietro, R, Dovis, F, Avenant, E, Wonnacott, R, Oyeyemi, E, Mahrous, A, Tsidu, GM, Lekamisy, H, Olwendo, JO, Sibanda, P, Gogie, TK, Rabiu, B, De Jong, K & Adewale, A 2014, 'Ionospheric imaging in Africa', Radio Science, vol. 49, no. 1, pp. 19-27. https://doi.org/10.1002/2013RS005238

APA

Chartier, A. T., Kinrade, J., Mitchell, C. N., Rose, J. A. R., Jackson, D. R., Cilliers, P., Habarulema, J-B., Katamzi, Z., Mckinnell, L-A., Matamba, T., Opperman, B., Ssessanga, N., Giday, N. M., Tyalimpi, V., De Franceschi, G., Romano, V., Scotto, C., Notarpietro, R., Dovis, F., ... Adewale, A. (2014). Ionospheric imaging in Africa. Radio Science, 49(1), 19-27. https://doi.org/10.1002/2013RS005238

Vancouver

Chartier AT, Kinrade J, Mitchell CN, Rose JAR, Jackson DR, Cilliers P et al. Ionospheric imaging in Africa. Radio Science. 2014 Mar 17;49(1):19-27. https://doi.org/10.1002/2013RS005238

Author

Chartier, Alex T. ; Kinrade, Joe ; Mitchell, Cathryn N. ; Rose, Julian A. R. ; Jackson, David R. ; Cilliers, Pierre ; Habarulema, John-Bosco ; Katamzi, Zama ; Mckinnell, Lee-Anne ; Matamba, Tshimangadzo ; Opperman, Ben ; Ssessanga, Nicholas ; Giday, Nigussie Mezgebe ; Tyalimpi, Vumile ; De Franceschi, Giorgiana ; Romano, Vincenzo ; Scotto, Carlo ; Notarpietro, Riccardo ; Dovis, Fabio ; Avenant, Eugene ; Wonnacott, Richard ; Oyeyemi, Elijah ; Mahrous, Ayman ; Tsidu, Gizaw Mengistu ; Lekamisy, Harvey ; Olwendo, Joseph Ouko ; Sibanda, Patrick ; Gogie, Tsegaye Kassa ; Rabiu, Babatunde ; De Jong, Kees ; Adewale, Adekola. / Ionospheric imaging in Africa. In: Radio Science. 2014 ; Vol. 49, No. 1. pp. 19-27.

Bibtex

@article{7376ca9745744704a40a002534e478fd,
title = "Ionospheric imaging in Africa",
abstract = "Accurate ionospheric specification is necessary for improving human activities such as radar detection, navigation, and Earth observation. This is of particular importance in Africa, where strong plasma density gradients exist due to the equatorial ionization anomaly. In this paper the accuracy of three-dimensional ionospheric images is assessed over a 2 week test period (2-16 December 2012). These images are produced using differential Global Positioning System (GPS) slant total electron content observations and a time-dependent tomography algorithm. The test period is selected to coincide with a period of increased GPS data availability from the African Geodetic Reference Frame (AFREF) project. A simulation approach that includes the addition of realistic errors is employed in order to provide a ground truth. Results show that the inclusion of observations from the AFREF archive significantly reduces ionospheric specification errors across the African sector, especially in regions that are poorly served by the permanent network of GPS receivers. The permanent network could be improved by adding extra sites and by reducing the number of service outages that affect the existing sites.Key PointsIonospheric image quality in Africa is assessed Simulated and real data are both used An extended receiver network greatly improves accuracy",
keywords = "ionosphere, GPS, IRI, imaging, tomography, Africa, ASSIMILATION, TOMOGRAPHY, ALGORITHM",
author = "Chartier, {Alex T.} and Joe Kinrade and Mitchell, {Cathryn N.} and Rose, {Julian A. R.} and Jackson, {David R.} and Pierre Cilliers and John-Bosco Habarulema and Zama Katamzi and Lee-Anne Mckinnell and Tshimangadzo Matamba and Ben Opperman and Nicholas Ssessanga and Giday, {Nigussie Mezgebe} and Vumile Tyalimpi and {De Franceschi}, Giorgiana and Vincenzo Romano and Carlo Scotto and Riccardo Notarpietro and Fabio Dovis and Eugene Avenant and Richard Wonnacott and Elijah Oyeyemi and Ayman Mahrous and Tsidu, {Gizaw Mengistu} and Harvey Lekamisy and Olwendo, {Joseph Ouko} and Patrick Sibanda and Gogie, {Tsegaye Kassa} and Babatunde Rabiu and {De Jong}, Kees and Adekola Adewale",
note = "{\textcopyright}2013. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. 0048-6604/14/10.1002/2013RS005238 ",
year = "2014",
month = mar,
day = "17",
doi = "10.1002/2013RS005238",
language = "English",
volume = "49",
pages = "19--27",
journal = "Radio Science",
issn = "0048-6604",
publisher = "AMER GEOPHYSICAL UNION",
number = "1",

}

RIS

TY - JOUR

T1 - Ionospheric imaging in Africa

AU - Chartier, Alex T.

AU - Kinrade, Joe

AU - Mitchell, Cathryn N.

AU - Rose, Julian A. R.

AU - Jackson, David R.

AU - Cilliers, Pierre

AU - Habarulema, John-Bosco

AU - Katamzi, Zama

AU - Mckinnell, Lee-Anne

AU - Matamba, Tshimangadzo

AU - Opperman, Ben

AU - Ssessanga, Nicholas

AU - Giday, Nigussie Mezgebe

AU - Tyalimpi, Vumile

AU - De Franceschi, Giorgiana

AU - Romano, Vincenzo

AU - Scotto, Carlo

AU - Notarpietro, Riccardo

AU - Dovis, Fabio

AU - Avenant, Eugene

AU - Wonnacott, Richard

AU - Oyeyemi, Elijah

AU - Mahrous, Ayman

AU - Tsidu, Gizaw Mengistu

AU - Lekamisy, Harvey

AU - Olwendo, Joseph Ouko

AU - Sibanda, Patrick

AU - Gogie, Tsegaye Kassa

AU - Rabiu, Babatunde

AU - De Jong, Kees

AU - Adewale, Adekola

N1 - ©2013. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. 0048-6604/14/10.1002/2013RS005238

PY - 2014/3/17

Y1 - 2014/3/17

N2 - Accurate ionospheric specification is necessary for improving human activities such as radar detection, navigation, and Earth observation. This is of particular importance in Africa, where strong plasma density gradients exist due to the equatorial ionization anomaly. In this paper the accuracy of three-dimensional ionospheric images is assessed over a 2 week test period (2-16 December 2012). These images are produced using differential Global Positioning System (GPS) slant total electron content observations and a time-dependent tomography algorithm. The test period is selected to coincide with a period of increased GPS data availability from the African Geodetic Reference Frame (AFREF) project. A simulation approach that includes the addition of realistic errors is employed in order to provide a ground truth. Results show that the inclusion of observations from the AFREF archive significantly reduces ionospheric specification errors across the African sector, especially in regions that are poorly served by the permanent network of GPS receivers. The permanent network could be improved by adding extra sites and by reducing the number of service outages that affect the existing sites.Key PointsIonospheric image quality in Africa is assessed Simulated and real data are both used An extended receiver network greatly improves accuracy

AB - Accurate ionospheric specification is necessary for improving human activities such as radar detection, navigation, and Earth observation. This is of particular importance in Africa, where strong plasma density gradients exist due to the equatorial ionization anomaly. In this paper the accuracy of three-dimensional ionospheric images is assessed over a 2 week test period (2-16 December 2012). These images are produced using differential Global Positioning System (GPS) slant total electron content observations and a time-dependent tomography algorithm. The test period is selected to coincide with a period of increased GPS data availability from the African Geodetic Reference Frame (AFREF) project. A simulation approach that includes the addition of realistic errors is employed in order to provide a ground truth. Results show that the inclusion of observations from the AFREF archive significantly reduces ionospheric specification errors across the African sector, especially in regions that are poorly served by the permanent network of GPS receivers. The permanent network could be improved by adding extra sites and by reducing the number of service outages that affect the existing sites.Key PointsIonospheric image quality in Africa is assessed Simulated and real data are both used An extended receiver network greatly improves accuracy

KW - ionosphere

KW - GPS

KW - IRI

KW - imaging

KW - tomography

KW - Africa

KW - ASSIMILATION

KW - TOMOGRAPHY

KW - ALGORITHM

U2 - 10.1002/2013RS005238

DO - 10.1002/2013RS005238

M3 - Journal article

VL - 49

SP - 19

EP - 27

JO - Radio Science

JF - Radio Science

SN - 0048-6604

IS - 1

ER -