Soares, Manuel GonçalvesMalheiro, BeneditaRestivo, Francisco José de Oliveira2014-12-022014-12-022003Manuel Gonçalves Soares; Benedita Malheiro; Francisco José de Oliveira Restivo. An internet DGPS service for precise outdoor navigation, Trabalho apresentado em 2003 IEEE Conference on Emerging Technologies and Factory Automation. Proceedings, In EFTA 2003. 2003 IEEE Conference on Emerging Technologies and Factory Automation. Proceedings (Cat. No.03TH8696), Lisbon, Portugal, 2003.0-7803-7937-3http://hdl.handle.net/10400.22/5227The goal of the work presented in this paper is to provide mobile platforms within our campus with a GPS based data service capable of supporting precise outdoor navigation. This can be achieved by providing campus-wide access to real time Differential GPS (DGPS) data. As a result, we designed and implemented a three-tier distributed system that provides Internet data links between remote DGPS sources and the campus and a campus-wide DGPS data dissemination service. The Internet data link service is a two-tier client/server where the server-side is connected to the DGPS station and the client-side is located at the campus. The campus-wide DGPS data provider disseminates the DGPS data received at the campus via the campus Intranet and via a wireless data link. The wireless broadcast is intended for portable receivers equipped with a DGPS wireless interface and the Intranet link is provided for receivers with a DGPS serial interface. The application is expected to provide adequate support for accurate outdoor campus navigation tasks.engGlobal PositioningNavigation SystemsOptical propagationMobile computingPosition measurementReal time systemsSatellite broadcastingStandards developmentTime measurementWeb and internet servicesconference object2014-10-2010.1109/ETFA.2003.1247750