http://hdl.handle.net/2122/103 2013-05-24T13:46:24Z http://hdl.handle.net/2122/5984 Title: Application of Autoscala to ionograms recorded by the AIS-Parus ionosonde Authors: Krasheninnikov, I.; Pushkov InstituteofTerrestrialMagnetism,IonosphereandRadiowavePropagation,Russia; Pezzopane, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Scotto, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Abstract: Autoscala was applied to ionograms recorded by the digital AIS-Parus ionosonde, built at the Pushkov Institute of Terrestrial Magnetism,Ionosphere and Radiowave Propagation, Russia, and installed in Moscow (55.5N,37.5E). Some results in regard to the reliability of the foF2, foF1, and ftEs autoscaled characteristics are presented and discussed. The flexibility of Autoscala is illustrated based on its modular structure. 2010-04-30T22:00:00Z http://hdl.handle.net/2122/5250 Title: COST 296 MIERS: conclusion Authors: Bourdillon, A.; IETR, Université de Rennes 1, France; Cander, L. R.; STFC, Rutherford Appleton Laboratory, Chilton, UK; Zolesi, B.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Abstract: The need for more reliable and efficient communications services, especially those involving ionospheric HF communications and navigational systems, imposes increasing demand for a better knowledge of the effects imposed by the Earth’s upper atmosphere and ways to mitigate disturbing effects. Temporal and spatial changes in the upper atmosphere act to limit and degrade the performance of terrestrial and Earth-space radio systems in many different ways and this is why mitigation activities must involve several topics like ionospheric monitoring and modeling, development of new hardware for communication systems and new propagation simulator, measurements and modeling of ionospheric Total Electron Content (TEC) and ionospheric scintillations, using in particular the Global Positioning System (GPS). The European ionospheric community has long been aware that cooperation research on an international basis is essential to deal with such complex issues. In particular, international cooperation is required for the collection of data, in both the real-time and in retrospective modes, the development and verification of new methods to improve the performance of both operational and future terrestrial and Earth-space communication systems and the exchange of expertise on space plasma effects on Global Navigation Satellite Systems (GNSS). In this context the COST 296 Action MIERS on the «Mitigation of Ionospheric Effects on Radio Systems» has made a significant impact in a number of areas. 2009-07-31T22:00:00Z http://hdl.handle.net/2122/5247 Title: COST 296 MIERS: Mitigation of Ionospheric Effects on Radio Systems Authors: Bourdillon, A.; IETR, Université de Rennes 1, France; Cander, L. R.; STFC, Rutherford Appleton Laboratory, Chilton, UK; Zolesi, B.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Abstract: The COST 296 Action MIERS (Mitigation of Ionospheric Effects on Radio Systems) within the ionospheric community has the objectives, embodied in the Memorandum of Understanding (MoU), to develop an increased knowledge of the effects imposed by the ionosphere on practical radio systems, and the development and implementation of techniques to mitigate the deleterious effects of the ionosphere on such systems. This introductory paper summarizes briefly the background and historical context of COST 296 and outlines the main objectives, working methods and structure. It also lists the participating countries and institutions, the Management Committee (MC) Meetings, the Workshops, Short-term Scientific Missions. In addition, the paper discusses the dissemination activities and the collaboration among the participating institutions and researchers, before outlining the content of the Final Report. 2009-07-31T22:00:00Z http://hdl.handle.net/2122/5241 Title: Ionospheric scintillation monitoring and modelling Authors: Béniguel, Y.; IEEA, Paris, France; Romano, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Alfonsi, Lu.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Aquino, M.; Institute of Engineering Surveying and Space Geodesy, IESSG, Nottingham, UK; Bourdillon, A.; IETR Université de Rennes 1, France; Cannon, P.; Qinetiq, Malvern, UK; De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Dubey, S.; DLR, Neustrelitz, Germany; Forte, B.; University of Nova Gorica, Slovenia; Gherm, V.; University of St Petersburg, Russia; Jakowski, N.; DLR, Neustrelitz, Germany; Materassi, M.; Institute for Complex Systems, National Council of Researches, Firenze, Italy; Noack, T.; DLR, Neustrelitz, Germany; Pozoga, M.; Space Research Center, Warsaw, Poland; Rogers, N.; Qinetiq, Malvern, UK; Spalla, P.; Institute for Complex Systems, National Council of Researches, Firenze, Italy; Strangeways, H. J.; School of Electronic and Electrical Engineering, University of Leeds, UK; Warrington, E. M.; Department of Engineering, University of Leicester, UK; Wernik, A.; Space Research Center, Warsaw, Poland; Wilken, V.; DLR, Neustrelitz, Germany; Zernov, N.; University of St Petersburg, Russia Abstract: This paper presents a review of the ionospheric scintillation monitoring and modelling by the European groups involved in COST 296. Several of these groups have organized scintillation measurement campaigns at low and high latitudes. Some characteristic results obtained from the measured data are presented. The paper also addresses the modeling activities: four models, based on phase screen techniques, with different options and application domains are detailed. Finally some new trends for research topics are given. This includes the wavelet analysis, the high latitudes analysis, the construction of scintillation maps and the mitigation techniques. 2009-07-31T22:00:00Z http://hdl.handle.net/2122/5240 Title: Climate of the upper atmosphere Authors: Bremer, J.; Leibniz-Institute of Atmospheric Physics, Kühlungsborn, Germany; Lăstovička, J.; Institute of Atmospheric Physics, Academy of Sciences of Czech Republic, Prague, Czech Republic; Mikhailov, A. V.; Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN),; Altadill, D.; Observatori de l’Ebre, Universitat Ramon Llull – CSIC, Spain; Bencze, P.; Geodetic and Geophysical Research Institute, Hungarian Academy of Sciences, Sopron, Hungary; Burešová, D.; Institute of Atmospheric Physics, Academy of Sciences of Czech Republic, Prague, Czech Republic; De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Jacobi, C.; Institute for Meteorology, University of Leipzig, Leipzig, Germany; Kouris, S.; Electrical and Computer Engineering Department, Aristotle University of Thessaloniki, Greece; Perrone, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Turunen, E.; Sodankylä Geophysical Observatory, Sodankylä, Finland Abstract: In the frame of the European COST 296 project (Mitigation of Ionospheric Effects on Radio Systems, MIERS)investigations of the climate of the upper atmosphere have been carried out during the last four years to obtain new information on the upper atmosphere. Mainly its ionospheric part has been analysed as the ionosphere is most essential for the propagation of radio waves. Due to collaboration between different European partners many new results have been derived in the fields of long-term trends of different ionospheric and related atmospheric parameters, the investigations of different types of atmospheric waves and their impact on the ionosphere, the variability of the ionosphere, and the investigation of some space weather effects on the ionosphere. 2009-07-31T22:00:00Z http://hdl.handle.net/2122/5239 Title: Near-Earth space plasma modelling and forecasting Authors: Strangeways, H. J.; School of Electronic and Electrical Engineering, University of Leeds, Leeds, UK; Kutiev, I.; Geophysical Institute, Bulgarian Academy of Sciences (BAS), Sofia, Bulgaria; Cander, L. R.; Rutherford Appleton Laboratory, Didcot, UK; Kouris, S.; Electrical and Computer Engineering Department, Aristotle University of Thessaloniki, Greece; Gherm, V.; Department of Radiophisics, University of St. Petersburg, Russian Federation; Marin, D.; University of Huelva, Huelva, Spain; De La Morena, B.; Atmospheric Sounding Station El Arenosillo, INTA, Huelva, Spain; Pryse, S. E.; Aberystwyth University, Aberystwyth, UK; Perrone, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Pietrella, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Stankov, S.; Royal Meteorological Institute, Brussels, Belgium; Tomasik, L.; Center for Space Research, Warsaw, Poland; Tulunay, E.; Middle East Technical University (METU), Ankara, Turkey; Tulunay, Y.; Middle East Technical University (METU), Ankara, Turkey; Zernov, N.; Department of Radiophisics, University of St. Petersburg, Russian Federation; Zolesi, B.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Abstract: In the frame of the European COST 296 project (Mitigation of Ionospheric Effects on Radio Systems, MIERS)in the Working Package 1.3, new ionospheric models, prediction and forecasting methods and programs as well as ionospheric imaging techniques have been developed. They include (i) topside ionosphere and meso-scale irregularity models, (ii) improved forecasting methods for real time forecasting and for prediction of foF2, M(3000)F2, MUF and TECs, including the use of new techniques such as Neurofuzzy, Nearest Neighbour, Cascade Modelling and Genetic Programming and (iii) improved dynamic high latitude ionosphere models through tomographic imaging and model validation. The success of the prediction algorithms and their improvement over existing methods has been demonstrated by comparing predictions with later real data. The collaboration between different European partners (including interchange of data) has played a significant part in the development and validation of these new prediction and forecasting methods, programs and algorithms which can be applied to a variety of practical applications leading to improved mitigation of ionosphereic and space weather effects. 2009-07-31T22:00:00Z http://hdl.handle.net/2122/5119 Title: Geomagnetism and Aeronomy activities in Italy during IGY, 1957/58 Authors: Meloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Alfonsi, Lu.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Abstract: In 2007 several events were organized to celebrate the fiftieth anniversary of the International Geophysical Year (IGY, 1957-1958). The celebrations will last until 2009 and are taking place within different contexts: the International Polar Year (IPY), the International Heliophysical Year (IHY), the electronic Geophysical Year (eGY) and the International Year of Planet Earth (IYPE). IGY offered a very appropriate and timely occasion to undertake a series of coordinated observations of various geophysical phenomena all over the globe. Italy took part in the broad international effort stimulated by IGY. In fact, Italy participated in observations and studies in many of the proposed scientific areas, in particular Geomagnetism and Aeronomy. The Istituto Nazionale di Geofisica (ING) started the installation of observatories, and updated and ensured continuous recording of geophysical observations. Geomagnetism, ionospheric physics, seismology, and other geophysical disciplines, were advanced. Although much of the work was undertaken in Italy, some attention was also devoted to other areas of the world, in particular Antarctica, where Italy participated in seismological observations. This paper gives a summary of the Geomagnetism and Ionospheric Physics activities within IGY. Furthermore, we highlight the importance of this historical event and its outcomes for the improvement of geophysical observations and the post-IGY growth of scientific investigations in Italy. 2009-03-31T22:00:00Z http://hdl.handle.net/2122/5067 Title: ANTARTIDE. Un osservatorio naturale per comprendere la Terra Authors: Meloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Cafarella, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Alfonsi, Lu.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Romano, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Morelli, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia; Danesi, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia; Grezio, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia; Russi, M.; Istituto Nazionale di Oceanografia e Geofisica sperimentale (OGS), Borgo Grotta Gigante, 42/c - Trieste; Guidarelli, M.; Dipartimento di Scienze della Terra, Università di Trieste, Via Weiss, 1 - Trieste; Bonaccorso, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia; Gambino, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia; Capra, A.; Dipartimento di Ingegneria Meccanica e Civile, Università di Modena e Reggio Emilia, Via Vignolese, 905 - Modena; Dubbini, M.; Dipartimento di Ingegneria Meccanica e Civile, Università di Modena e Reggio Emilia, Via Vignolese, 905 - Modena; Pellegrini, A.; Ente per le Nuove tecnologie, l'Energia e l'Ambiente (ENEA - Casaccia), Via Anguillarese, 301 - Roma; Gentili, U.; Ente per le Nuove tecnologie, l'Energia e l'Ambiente (ENEA - Casaccia), Via Anguillarese, 301 - Roma; Mancini, F.; Dipartimento di Architettura e Urbanistica, Politecnico di Bari, Via Orabona, 4 - Bari; Georgiadis, T.; Istituto di Biometeorologia (IBIMET), CNR, Via Gobetti, 101 - Bologna; Nardini, M.; Istituto di Biometeorologia (IBIMET), CNR, Via Gobetti, 101 - Bologna; Bonasoni, P.; Istituto di Scienze dell'Atmosfera e del Clima (ISAC), CNR, Via Gobetti, 101 - Bologna; Vitale, V.; Istituto di Scienze dell'Atmosfera e del Clima (ISAC), CNR, Via Gobetti, 101 - Bologna; Lupi, A.; Istituto di Scienze dell'Atmosfera e del Clima (ISAC), CNR, Via Gobetti, 101 - Bologna; Cristofanelli, P.; Istituto di Scienze dell'Atmosfera e del Clima (ISAC), CNR, Via Gobetti, 101 - Bologna; Snels, M.; Istituto di Scienze dell'Atmosfera e del Clima (ISAC), CNR, Via Fosso del Cavaliere, 100 - Roma; Cairo, F.; Istituto di Scienze dell'Atmosfera e del Clima (ISAC), CNR, Via Fosso del Cavaliere, 100 - Roma Abstract: Molto è noto delle particolarissime condizioni che rendono l'Antartide un laboratorio veramente speciale per tante discipline. Tuttavia, per le Scienze della Terra il continente antartico ha un doppio interesse. Oltre ad essere un luogo poco conosciuto dove avvengono processi straordinari ed unici per il nostro pianeta, esso occupa anche una posizione privilegiata per la registrazione di dati geofisici. Questi dati sono essenziali per la comprensione globale di molti processi fisici e ci aiutano dunque a capire come la Terra "funziona" nel suo insieme. L'Antartide è, quindi, un luogo di osservazione cruciale per la conoscenza del pianeta in cui viviamo. I processi geofisici presentano variazioni su lunghi periodi. Di conseguenza, la registrazione di lunghe e ininterrotte serie temporali è un impegno basilare per gli osservatori geofisici. Come noi traiamo vantaggio dalle registrazioni della declinazione del campo magnetico fatte dai marinai del XVIII secolo, dalle cronologie degli effetti dei terremoti trovate in archivi storici e dalle informazioni sul tempo e sulle temperature dell'aria scritte negli antichi almanacchi, così dobbiamo impegnarci per acquisire ed allo stesso tempo conservare le registrazioni strumentali secondo i migliori livelli consentiti dalla tecnologia odierna. Seguendo queste considerazioni, il programma antartico Italiano - in modo simile ai programmi di altre nazioni - si sta prodigando in uno sforzo continuo nel mantenimento e nel miglioramento degli osservatori geofisici permanenti. Forse alcune di queste attività non forniscono dati con forte impatto immediato, ma la loro vera importanza si evidenzierà certamente in futuro. Il funzionamento degli osservatori geofisici antartici è anche un obbligo verso le prossime generazioni, per metterle in condizione di comprendere quello che a noi sfugge ancora. 2008-12-31T23:00:00Z http://hdl.handle.net/2122/5058 Title: Time of flight measurements over a radio link from Uppsala to Bruntingthorpe and their application to testing predictions methods that approximate the ray tracing technique Authors: Pietrella, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Warrington, E. M.; Department of Engineering, University of Leicester, LE1 7RH, UK; Stocker, A. J.; Department of Engineering, University of Leicester, LE1 7RH, UK; Bianchi, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Abstract: Time of flight measurements (TOF) over the radio link between Uppsala (Tx: 59.9°N, 17.6°E) and Bruntingthorpe (Rx: 52.5°N, 1.1°W) have been performed every 2 min at six frequencies (4.637, 6.954, 8.008, 10.391, 11.118, and 14.364 MHz) during the period November 2006–January 2008. Such measurements have been compared with the TOF provided by three prediction methods that approximate the ray tracing technique: IRI-95, SIRM&BR_D, and ICEPAC. The root mean square deviation (rms) between TOF monthly median measurements and TOF monthly median predictions and the differences (DP) between the length of the median and predicted ray path have been calculated. The results, which are presented in terms of rms and DP for different seasons and different time periods, have indicated that the approximate methods are inadequate and that for more accurate predictions ray tracing techniques should be applied. 2009-06-30T22:00:00Z http://hdl.handle.net/2122/5056 Title: Oblique-incidence ionospheric soundings over Central Europe and their application for testing now casting and long term prediction models Authors: Pietrella, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Perrone, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Fontana, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Romano, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Malagnini, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Tutone, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Zolesi, B.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Cander, Lj. R.; Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, UK; Belehaki, A.; National Observatory, Institute for Space Applications and Remote Sensing, 15236 P. Penteli, Athens, Greece; Tsagouri, I.; National Observatory, Institute for Space Applications and Remote Sensing, 15236 P. Penteli, Athens, Greece; Kouris, S. S.; Department of Electrical and Computer Engineering, Aristotelian University of Thessaloniki, Thessaloniki, Greece; Vallianatos, F.; Technological Educational Institute of Crete, P.O. Box 1939 Chania, Crete, Greece; Makris, J.; Technological Educational Institute of Crete, P.O. Box 1939 Chania, Crete, Greece; Angling, M.; Centre for RF Propagation and Atmospheric Research, QinetiQ, Malvern Worcestershire WR14 3PS, UK Abstract: After a first oblique-incidence ionospheric sounding campaign over Central Europe performed during the period 2003–2004 over the radio links between Inskip (UK, 53.5°N, 2.5°W) and Rome (Italy, 41.8°N, 12.5°E) and between Inskip and Chania (Crete, 35.7°N, 24.0°E), new and more extensive analysis of systematic MUF measurements from January 2005 to December 2006 have been performed. MUF measurements collected during moderately disturbed days (17 ≤ Ap ≤ 32), disturbed days (32 < Ap ≤ 50) and very disturbed days (Ap > 50), have been used to test the long term prediction models (ASAPS, ICEPAC and SIRM&LKW), and the now casting models (SIRMUP&LKW and ISWIRM&LKW). The performances of the different prediction methods in terms of r.m.s are shown for selected range of geomagnetic activity and for each season. 2009-06-01T22:00:00Z