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report of the action team on global navigation satellite systems (gnss)

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326. The regi<strong>on</strong>al activity in <str<strong>on</strong>g>the</str<strong>on</strong>g> field <str<strong>on</strong>g>of</str<strong>on</strong>g> GNSS is reflected in various c<strong>on</strong>ferences. From 1991to 1999, biennial scientific symposia titled “GPS in Central Europe” were held in Hungary withparticipants from <str<strong>on</strong>g>the</str<strong>on</strong>g> regi<strong>on</strong> and o<str<strong>on</strong>g>the</str<strong>on</strong>g>r areas. The topics covered included geodesy, heightdeterminati<strong>on</strong>, geodynamics, reference frames, meteorology, differential GPS, instrumentati<strong>on</strong>,data analysis techniques and several o<str<strong>on</strong>g>the</str<strong>on</strong>g>r issues. The proceedings <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> symposia werepublished by <str<strong>on</strong>g>the</str<strong>on</strong>g> Satellite Geodetic Observatory <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> Institute <str<strong>on</strong>g>of</str<strong>on</strong>g> Geodesy and Cartography,Hungary (www.sgo.fomi.hu) and <str<strong>on</strong>g>the</str<strong>on</strong>g> Institute <str<strong>on</strong>g>of</str<strong>on</strong>g> Geodesy and Geodetic Astr<strong>on</strong>omy, WarsawUniversity <str<strong>on</strong>g>of</str<strong>on</strong>g> Technology, Poland (gik.pw.edu.pl/igga.html) in <str<strong>on</strong>g>the</str<strong>on</strong>g> Reports <str<strong>on</strong>g>of</str<strong>on</strong>g> Geodesy series.327. Ano<str<strong>on</strong>g>the</str<strong>on</strong>g>r important event in Austria was <str<strong>on</strong>g>the</str<strong>on</strong>g> holding <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> European Navigati<strong>on</strong>C<strong>on</strong>ference <strong>on</strong> Global Navigati<strong>on</strong> Satellite Systems, hosted by OVN <strong>on</strong> behalf <str<strong>on</strong>g>of</str<strong>on</strong>g> EUGIN, from22 to 25 April 2003 at <str<strong>on</strong>g>the</str<strong>on</strong>g> C<strong>on</strong>gress Centre in Graz, Styria (ENC – GNSS, www.<strong>gnss</strong>2003.com).The ENC – GNSS 2003 was <str<strong>on</strong>g>the</str<strong>on</strong>g> seventh c<strong>on</strong>ference in <str<strong>on</strong>g>the</str<strong>on</strong>g> GNSS series held under <str<strong>on</strong>g>the</str<strong>on</strong>g> auspices<str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> European Group <str<strong>on</strong>g>of</str<strong>on</strong>g> Institutes <str<strong>on</strong>g>of</str<strong>on</strong>g> Navigati<strong>on</strong> (EUGIN). The c<strong>on</strong>ference focused <strong>on</strong> <str<strong>on</strong>g>the</str<strong>on</strong>g>actual status as well as <strong>on</strong> future developments in <strong>satellite</strong> navigati<strong>on</strong> <strong>systems</strong>, with specialemphasis <strong>on</strong> GALILEO.328. In Italy, <str<strong>on</strong>g>the</str<strong>on</strong>g> use <str<strong>on</strong>g>of</str<strong>on</strong>g> <strong>satellite</strong>-based navigati<strong>on</strong> <strong>systems</strong> is c<strong>on</strong>tinuously growing in <str<strong>on</strong>g>the</str<strong>on</strong>g>various transport sectors: civil aviati<strong>on</strong>, maritime and ground (road and rail) as well as innumerous fields <str<strong>on</strong>g>of</str<strong>on</strong>g> “n<strong>on</strong>-transport” applicati<strong>on</strong>s such as geodesy, agriculture, GIS, and RTK.329. The Italian Ministry <str<strong>on</strong>g>of</str<strong>on</strong>g> Transport, based <strong>on</strong> <str<strong>on</strong>g>the</str<strong>on</strong>g> promoti<strong>on</strong>al activities c<strong>on</strong>ducted by <str<strong>on</strong>g>the</str<strong>on</strong>g>Italian Space Agency and <str<strong>on</strong>g>the</str<strong>on</strong>g> Italian Institute <str<strong>on</strong>g>of</str<strong>on</strong>g> Navigati<strong>on</strong>, has undertaken an attempt topromote <str<strong>on</strong>g>the</str<strong>on</strong>g> debates for a nati<strong>on</strong>al Radio Navigati<strong>on</strong> Plan, allowing to co-ordinate radi<strong>on</strong>avigati<strong>on</strong> <strong>systems</strong> <strong>on</strong> <str<strong>on</strong>g>the</str<strong>on</strong>g> territory in a harm<strong>on</strong>ised and cooperated fashi<strong>on</strong>.330. The Italian Space Agency (ASI- www.asi.it), being <strong>on</strong>e <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> major c<strong>on</strong>tributors to <str<strong>on</strong>g>the</str<strong>on</strong>g>European Programme GALILEO, is fostering <str<strong>on</strong>g>the</str<strong>on</strong>g> development <str<strong>on</strong>g>of</str<strong>on</strong>g> Applicati<strong>on</strong>s <str<strong>on</strong>g>of</str<strong>on</strong>g> SatelliteNavigati<strong>on</strong> in co-operati<strong>on</strong> with Governmental Operati<strong>on</strong>al Entities (ENAC, ENAV, Italian CoastGuard) in order to pave <str<strong>on</strong>g>the</str<strong>on</strong>g> way for GALILEO.331. As far as <str<strong>on</strong>g>the</str<strong>on</strong>g> Reference Networks for precise positi<strong>on</strong>ing is c<strong>on</strong>cerned, <str<strong>on</strong>g>the</str<strong>on</strong>g> Italian SpaceAgency is owner <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> main network in Italy, which is part <str<strong>on</strong>g>of</str<strong>on</strong>g> an internati<strong>on</strong>al geodesy network.Research activities332. The use <str<strong>on</strong>g>of</str<strong>on</strong>g> GPS techniques in Portugal goes back to <str<strong>on</strong>g>the</str<strong>on</strong>g> 1980s, when a large observati<strong>on</strong>campaign was organised by <str<strong>on</strong>g>the</str<strong>on</strong>g> Faculty <str<strong>on</strong>g>of</str<strong>on</strong>g> Sciences, University <str<strong>on</strong>g>of</str<strong>on</strong>g> Porto, in co-operati<strong>on</strong> with <str<strong>on</strong>g>the</str<strong>on</strong>g>Geodetic Institute, University <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> Armed Forces <str<strong>on</strong>g>of</str<strong>on</strong>g> Munich, to m<strong>on</strong>itor plate-tect<strong>on</strong>icmovements in <str<strong>on</strong>g>the</str<strong>on</strong>g> Azores-Gibraltar area .333. Since <str<strong>on</strong>g>the</str<strong>on</strong>g>n, many research projects have been carried out, going from studies <str<strong>on</strong>g>of</str<strong>on</strong>g> platetect<strong>on</strong>ics and volcanism to <str<strong>on</strong>g>the</str<strong>on</strong>g> study <str<strong>on</strong>g>of</str<strong>on</strong>g> high atmosphere from <strong>on</strong>-board GPS measurements,passing by different projects <strong>on</strong> Earth, including navigati<strong>on</strong> and attitude determinati<strong>on</strong> andc<strong>on</strong>trol. In some cases, besides GPS, also <str<strong>on</strong>g>the</str<strong>on</strong>g> GLONASS system has been used. As a result, alarge number <str<strong>on</strong>g>of</str<strong>on</strong>g> scientific papers have been published and several Ph.D. <str<strong>on</strong>g>the</str<strong>on</strong>g>sis have been writtenin Portuguese universities as well as in research institutes. At present, attenti<strong>on</strong> is also beinggiven to <str<strong>on</strong>g>the</str<strong>on</strong>g> development <str<strong>on</strong>g>of</str<strong>on</strong>g> GNSS and GALILEO.59

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