Abstract
Position accuracy evaluation of the modernized Polish DGPS Polish Maritime DGPS system has been modernized to meet the requirements set out in IMO resolution for a future GNSS, but also to preserve backward signal compatibility of user equipment. Having finalized installation of the new technology L1, L2 reference equipment performance tests were performed. This paper presents results of the long-term signal measuring campaign of the DGPS reference station Rozewie, which was performed in July 2009. Final results allowed to verify repeatable and absolute accuracy of the system after the modernization. Obtained statistics were compared to past measurements performed in 2005 when previous system infrastructure was in operation.
Highlights
Maritime DGPS system was developed to provide position and integrity information to maritime users
The first Polish DGPS station was established by Polish Hydrographic Office in 1994, the system was composed of two independent maritime reference stations located in Rozewie and Dziwnów and common control station in Gdynia
Station integrity is under control of single local integrity monitor (L1 DGPS receiver) plus one broadcast station controller – a high end industrial PC well equipped with multiport cards
Summary
Maritime DGPS system was developed to provide position and integrity information to maritime users. The first Polish DGPS station was established by Polish Hydrographic Office in 1994, the system was composed of two independent maritime reference stations located in Rozewie and Dziwnów and common control station in Gdynia Both RS stations equipped with local integrity monitors were remotely controlled by PSTN network. National radio-navigation policy assessed the current and potential use of the DGPS in navigation, concluded that there was a requirement to improve functionality while modernized It was evident, that any new approaches that could meet higher requirements and provide enhanced services, had to preserve backward compatibility of existing users’ equipment. There are two reference stations: RS Dziwnów – at west coast, and RS Rozewie at north-east, coast, has been equipped with local integrity monitors (RSIM model) Both sites are being under permanent control of Control Station in Gdynia, where a dedicated server continuously gathers operational information from all RS sites and remote integrity monitors. A living data base of system performance is available there in real time
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