Advances in Positioning and Reference Frames

of the SIRGAS 95 GPS Network Processing at DGFI/I.- The Integration of Brazilian Geodetic Network into SIRGAS.- Adjustment of the New Venezuelan National GPS Network within the SIRGAS Reference Frame.- Realization of a Geocentric Reference System in Argentina in Connection with SIRGAS.- Some Considerations Related to the New Realization of SAD-69 in Brazil.- The IGS Regional Network Associate Analysis Center for South America at DGFI/I.- The Redefinition of the Geodetic Reference System of Uruguay into SIRGAS Frame.- Session 4: Current Developments in Precise GPS Positioning.- GPS Ambiguity Resolution for Navigation, Rapid Static Surveying, and Regional Networks.- GPS Antenna and Site Effects.- Precise GPS Positioning Improvements by Reducing Antenna and Site Dependent Effects.- IGS Orbit, Clock and EOP Combined Products: An Update.- The Use of GPS for Monitoring of the Ionospheric Disturbances.- An Integrated GPS Monitoring System for Site Investigation of Nuclear Waste Disposal.- Determination of Stochastic Models of GPS Baselines in GPS Network Adjustment.- The Assisi Landslide GPS Network.- Use of a Regional Ionospheric Model in GPS Geodetic Applications.- Instantaneous Ambiguity Resolution for Medium-Range GPS Kinematic Positioning Using Multiple Reference Stations.- Exploiting the SIRGAS Colocations for Determining Elevation Dependent Phase Center Variations of Geodetic GPS Antennas.- Real-Time Failure Detection and Repair in Ionospheric Delay Estimation Using GPS by Robust and Conventional Kalman Filter State Estimates.- GPS Levelling Results fromTwo Test Areas in Finland.- Quality Control Algorithms for Permanent GPS Receiver Applications.- Fast Ambiguity Resolution in Network Mode.- Session 5: GPS Kinematic Applications.- High Precision GPS Kinematic Positioning: Progress and Outlook.- Kinematic Positioning Using Adaptive Filters and Multiple DGPS Receiver Configurations.- Estimating the Residual Tropospheric Delay for Airborne Differential GPS Positioning.- High-Accuracy Airborne Integrated Mapping System.- Airborne GPS Performance during a Photogrammetric Project.- Signal Distortion in High Precision GPS Surveys (Abstract).- Testing GPS Approaches for Civil Aviation in the Swiss Alps.- Static and Kinematic Positioning with GPS for the Construction and Maintenance of High Speed Railway Lines.- Kinematic GPS for Ice Sheet Surveys in Greenland.- A Reweighted Filtering Algorithm and its Application to Open Pit Deformation Monitoring.- Permanent Automatic GPS Deformation Monitoring Systems: A Review of System Architecture and Data Processing Strategies.- Modified GPS-OTF Algorithms for Bridge Monitoring: Application to the Pierre-Laporte Suspension Bridge in Quebec City.- The GPS Component of the Project for Digital Mapping of the KARST Aquifer System Near Curitiba, Brazil (Abstract).- Kinematic GPS Positioning with Adaptive Kalman Filtering Techniques.