TESTING ACCURACY OF MARITIME DGPS SYSTEM BASED ON LONG-TERM MEASUREMENTS CAMPAIGNS OVER THE YEARS 2006-2014

The paper presents a comparative analysis of statistical accuracy (repeatable and predictable) of a maritime DGPS system in three long time measurement campaigns carried out in: 2006, 2009 and the last in May 2014 (0.95 million fixes). In a ll the above mentioned studies, the measurements were taken at the same Polish reference station ? Rozewie and the same location of the measuring receiver. Therefore, the conclusions of the examination can be more general. The results indicate the existence of a direct relationship between the increase in the accuracy of the GPS system and the accuracy of the differential version. They also demonstrated that the system obtained the accuracy of 1-2 m (p = 0.95).