In this section, you may select from DGPS general references and DGPS-related Internet links. DGPS General References Canada-Wide Differential GPS Service (PDF - 342kb) Nationwide DGPS Enhancement Notice of Availability of a Draft NDGPS Programmatic Environmental Assessment NDGPS Programmatic Environmental Assessment Design Process for the Coast Guard's DGPS Navigation Service (MS WORD 97 - 70kb) Antenna Installation Guidelines and Certification USCG Differential GPS Navigation Service (PDF - 224kb) Differential GPS Integrity Monitors U. S. Cost Guard Environmental Assesment for Air Station Key West, Geiger Key, FL DGPS; Geiger Key, Florida: Environmental Assessment and Finding DGPS User Safety Advisory An Aid to Positive Train Control (PDF - 60kb) Broadcast Standard for the USCG DGPS Navigation Service (PDF - 1.17 Megs) RTCM Recommended Standards For Differential NAVSTAR GPS Service DGPS Internet Related Links The following sites are not under the control of the U.S. Coast Guard Navigation Center. NGS CORS Information US Coast Guard Command and Control Engineering Center (C2CEN) US Coast Guard Research and Development Center Optimizing the DGPS Infrastructure by Aeronautics and Space Engineering Board Commission on Engineering and Technical Systems, National Research Council The Radio Technical Commission for Maritime Services return to top