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CAMPAIGN FOR THE SELECTION OF SITES ELIGIBLE FOR INSTALLATION OF GNSS / CORS STATIONS IN ALGERIA: STUDY AND ANALYSIS
Abstract
A nationwide project is under taken since a few years with the purpose to upgrade the geodetic infrastructure by setting up a wide real-time GNSS/CORS (Global Navigation Satellite System/Continuously Operating Reference Stations) network. In this perspective, a study is achieved in the setting of this assignment with the purpose to select eligible sites of the network infrastructure. The technical selection criteria were based essentially on the assessment of GNSS data received by permanent sites under experiment. Northern and southern GNSS sites over the territory has been selected to perform this investigation. These sites are located in Algiers (DZAL), Oran (DZOR) and Constantine (DZCO) in the north and in Ouargla (OGLA), Bechar (BECH) and Tindouf (TIND) in the south. The study is based on evaluation of monument stability analysis through the post-processing of data supplied by these GNSS sites, multipath and signal interference evaluation. Finally, we analyzed the Vertical Total Electron Content (VTEC) variations in the aim to confirm a previous result in term of ionosphere response at low latitude.
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