PPP-RTK Service for Port Navigation using State Space Representation in DGNSS Medium Frequency Wave

Abstract

Recently, The precise positioning technique for satisfying PNT information requirement of positioning and navigation in maritime application is getting a lot of international attention. Especially, Horizontal positioning accuracy requirement in port navigation of International Maritime Organization (IMO) resolution A.915 (22) presented maritime policy and requirement for a future GNSS is 1m. Automatic docking, hydrograph, dredging, construction works and cargo handling applications are demanding precise positioning service. RTK technique. One of the precise positioning service solutions, is restricted in service coverage and two way communication. On the contrary, PPP technique use one way communication for satellite orbit and clock correction and have the merit of wide coverage and absolute positioning. However, precise point positioning based on RTK networks (PPP-RTK) overcome these RTK and PPP limitations and gives centimeter-accuracy and short convergence time. PPP-RTK using state-space date estimate and describes each individual GNSS errors of satellite orbit, satellite clocks, ionosphere, and troposphere. Update rate of State Space Representation (SSR) is different from eacherror factor. However it is required within 30 seconds. In Gerhard Wubbena’s paper, another factor for bandwidth reduction is the possibility to optimize the necessary parameter ranges. For SSR the parameter ranges can be chosen with respe