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Sarti, P.
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- PublicationRestrictedVLNDEF Project for Geodetic Infrastructure Definition of Northern Victoria Land, Antarctica(2008)
; ; ; ; ; ; ; ; ; ; ; ; ; ;Capra, A.; DIMeC, Universita’ di Modena e Reggio Emilia ;Dubbini, M.; DIMeC, Universita’ di Modena e Reggio Emilia ;Galeandro, A.; DIASS, Politecnico di Bari ;Gusella, L.; DISTART, Universita’ di Bologna ;Zanutta, A.; DISTART, Universita’ di Bologna ;Casula, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia ;Negusini, M.; IRA – INAF, Bologna ;Vittuari, L.; DISTART, Universita’ di Bologna ;Sarti, P.; IRA – INAF, Bologna ;Mancini, F.; DAU, Politecnico di Bari ;Gandolfi, S.; DISTART, Universita’ di Bologna ;Montaguti, M.; DISTART, Universita’ di Bologna, IRA – INAF, Bologna ;Bitelli, G.; DISTART, Universita’ di Bologna; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Capra, A.; DIMeC, Universita’ di Modena e Reggio Emilia ;Dietrich, R.; Technische Universitat of Dresden, Germany; Scientific investigations in Antarctica are, for many different reasons, a challenging and fascinating task. Measurements, observations and field operations must be carefully planned well in advance and the capacity of successfully meeting the goals of a scientific project is often related to the capacity of forecasting and anticipating the many different potential mishaps. In order to do that, experience and logistic support are crucial. On the scientific side, the team must be aware of its tasks and be prepared to carry out observations in a hostile environment: both technology and human resources have to be suitably selected, prepared, tested and trained. On the logistic side, nations, institutions and any other organisation involved in the expeditions must ensure the proper amount of competence and practical support. The history of modern Italian Antarctic expeditions dates back to the middle 80’s when the first infrastructures of “Mario Zucchelli Station”, formerly Terra Nova Bay Station, were settled at Terra Nova Bay, Northern Victoria Land. Only a few years later, the first geodetic infrastructures were planned and built. Italian geodetic facilities and activities were, ever since, being constantly maintained and developed. Nowadays, the most remarkable geodetic infrastructures are the permanent Global Positioning System (GPS) station (TNB1) installed at Mario Zucchelli and the GPS geodetic network Victoria Land Network for DEFormation control (VLNDEF) entirely deployed on an area extending between 71° S and 76° S and 160° E and 170° E. These facilities do not only allow carrying out utmost geodetic investigations but also posses interesting capacities on the international multidisciplinary scientific scenario. In order to fully exploit their potentiality, management and maintenance of the infrastructure are crucial; nevertheless, in order to perform high quality scientific research, these abilities must be coupled with the knowledge concerning a proper use and a correct processing of the information that these infrastructures can provide. This work focuses on the different methods that can be applied to process the observations that are performed with GPS technique in Northern Victoria Land, aiming at reaching the highest accuracy of results and assuring the larger significance and versatility of the processing outcomes. Three software were used for the analysis, namely: Bernese v.5.0, Gipsy/Oasis II and Gamit/Globk. The working data sets are (i) the permanent GPS station TNB1 observations continuously performed since 1998 and (ii) the five episodic campaigns performed on the sites of VLNDEF. The two infrastructures can be regarded as neat examples of standard geodetic installation in Antarctica. Therefore, the technological solutions that were adopted and applied for establishing the GPS permanent station and the VLNDEF geodetic network as well as the data processing strategies and the data analysis procedures that were tested on their observation will be illustrated in detail. The results will be presented, compared and discussed. Furthermore, their potentials and role in geodetic research will be carefully described; their versatility will also be highlighted in the foreground of a multidisciplinary Antarctic international scientific activity.164 27 - PublicationRestrictedImaging of the Antarctic ionosphere: Experimental results(2009-11)
; ; ; ; ; ; ; ; ; ; ; ;Yin, P.; College of Electronic Information Engineering,Civil Aviation University of China,Tianjin,China ;Mitchell, C. N.; Department of Electronic and Electrical Engineering, University of Bath, Bath BA2 7AY,UK ;Alfonsi, Lu.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Pinnock, M.; British Antarctic Survey, UK ;Spencer, P.; Department of Electronic and Electrical Engineering, University of Bath, Bath BA2 7AY, UK ;De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Romano, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Newell, P.; Johns Hopkins University, Applied Physics Laboratory, USA ;Sarti, P.; Istituto Radio Astronomia (IRA)-INAF, Bologna, Italy ;Negusini, M.; Istituto Radio Astronomia (IRA)-INAF, Bologna, Italy ;Capra, A.; Università di Modena e Reggio Emilia, Italy; ; ; ; ; ; ; ; ; ; Ground-based dual-frequency GPS observations can be used to create images of electron density.This is well established for the Arctic ionosphere; here one of the first results is presented for the Antarctic. In this study, the GPS receivers in the Antarctic are supplemented with another GPS receiver onboard CHAMP. The aim of the study is to demonstrate the technique for investigating geophysical events, for example, an ionospheric disturbance period on 11 February 2004. The images have been validated by in-situ measurements from DMSP and CHAMP satellites, as well as Super Dual Auroral Radar Network (SuperDARN) convection patterns, which are able to confirm the location, presence, and transportation of large-scale plasma patches. This study indicates that although the convection still dominates in the high-latitude ionosphere, soft precipitation within the polar cap may play a role in the evolution of the polar patches. It also illustrates the potential for future multi-instrument studies of the Antarctic.304 34