Comparisons of observed ionospheric F2 peak parameters with IRI-2001 predictions over South Africa |
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| Authors: | AO Adewale EO Oyeyemi LA McKinnell |
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| Institution: | 1. Department of Physics, University of Lagos, Lagos, Nigeria;2. Hermanus Magnetic Observatory, Hermanus, South Africa;3. Department of Physics & Electronics, Rhodes University, Grahamstown, South Africa;1. CIASUR, Facultad Regional Tucumán, Universidad Tecnológica Nacional, Tucumán, Argentina;2. Laboratorio de Ionósfera, Dto. de Física, FACET, Universidad Nacional de Tucumán, Independencia 1800, 4000 S. M. Tucumán, Argentina;3. Laboratorio de Telecomunicaciones, FACET, Universidad Nacional de Tucumán, Independencia 1800, 4000 S. M. Tucumán, Argentina;4. CONICET, Buenos Aires, Argentina;5. Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143, Rome, Italy;6. Instituto de Ciencias Astronómicas, de la Tierra y el Espacio (ICATE) CONICET-UNSJ, San Juan, Argentina;1. School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy;2. Department of Neurosurgery, Galliera Hospital, Genova, Italy;3. Milan Center for Neuroscience (NeuroMI), Milan, Italy;4. School of Public Health, Department of Health Sciences (DISSAL), University of Genova, DINOGMI, Genova, Italy;5. Centro Ricerca Tettamanti, Department of Pediatrics, University of Milano-Bicocca, Fondazione MBBM/San Gerardo Hospital, Monza, Italy;1. Finnish Meteorological Institute, PO Box 503, FIN-00101 Helsinki, Finland;2. Department of Physical Sciences, The Open University, Milton Keynes MK7 6AA, UK;3. International Space Science Institute, 3012 Bern, Switzerland;1. Department of Biomedical Sciences for Health, Functional Anatomy Research Center (FARC), Laboratory of Functional Anatomy of the Stomatognathic System (LAFAS), Faculty of Medicine and Surgery, Università degli Studi di Milano, Milan, Italy;2. Department of Medical and Surgical Specialties, Radiologic Sciences, and Public Health, Dental Clinic, Università degli Studi di Brescia, Brescia, Italy;3. Department of Clinical Sciences and Community Health, Institute of Medical Statistics and Biometry “G.A. Maccacaro,” University of Milan, Milan, Italy;4. Department of Ophthalmology, Otolaryngology, and Head and Neck Surgery, Faculty of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil;5. Unit of Medical Statistics and Biometry, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy;1. Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA;2. Department of General Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA |
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| Abstract: | The monthly means of the ionospheric F2 peak parameters (foF2 and hmF2) over three stations in South Africa (Grahamstown, 33.3°S, 26.5°E, Madimbo, 22.4°S, 26.5°E, and Louisvale, 28.5°S, 21.2°E) were analyzed and compared with IRI-2001, using CCIR (Comité Consultatif International des Radio communications) and URSI (Union Radio-Scientifique Internationale coefficients) options. The analysis covers a few selected quiet and disturbed days during various seasons represented by the months of January, April, July and October 2003. IRI-2001 generally overestimates hmF2 for both quiet and disturbed days and it overestimates and underestimates foF2 at different times for all the stations. In general, foF2 is predicted more accurately by IRI-2001 than hmF2, and on average, the CCIR option performed better than the URSI option when predicting both foF2 and hmF2.In general, the model generates good results, although some improvements are still necessary to be implemented in order to obtain better predictions. There are no significant differences in the model predictions of hmF2 and foF2 for quiet and disturbed days. |
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