M-Estimation as a Tool Supporting a Vessel Traffic Controller in the VTS System

Abstract

In order to improve maritime safety and the efficiency of vessel traffic, systems supervising vessel traffic, i.e. VTS (Vessel

Analysis of A Practical Application of Geodetic Methods of Robust Estimation in a Vessel Positioning Based on Radar Observations

“…The example considered in this paper refers to a situation described in (Świerczyński, Czaplewski 2015). The analysis presented here concerns a measurement network, in which navigational observations are acquired from coastal radar stations operating within the "VTS Gdańsk Bay".…”

“…The original observation weights are modified for all measurement results, and the equivalent weight depends on the value of i v . The procedure for determining equivalent weights of measurement results in navigational measurement structures has been described in detail elsewhere (Czaplewski 2004;Czaplewski, Wiśniewski 2008;Świerczyński, Czaplewski 2015). …”

“…This paper is an extension of the research presented in (Świerczyński, Czaplewski 2013(Świerczyński, Czaplewski , 2015. Our study aims at determining whether the application of different weight functions and different variants of parameters, which control robust observation adjustment, has a significant effect on the accuracy of vessel positioning in navigation networks.…”

“…The effect of outlying observations on the final result of estimation in these methods is eliminated or at least limited by application of the appropriate weight function. Such an approach to working out observations acquired from coastal radar stations has been proposed and discussed in detail in previous papers (Czaplewski 2004;Świerczyński, Czaplewski 2013Świerczyński, Czaplewski , 2015. These papers propose the application of the Danish weight function in the process of robust adjustment of navigational observations, and, in consequence, in determination of reliable coordinates of the vessel position.…”

Application of Square Msplit Estimation in Determination of Vessel Position in Coastal Shipping

“…Nonetheless, in case of navigation networks, such analyses are impossible to perform due to a dynamic position change of the studied subject (vessel). The results of slightly milder suppression of outliers were presented in the paper (Świerczyński and Czaplewski 2015). However, it should be emphasized that, despite classifying the observation NR 3 as an outlier, the vessel position determined with the use of the Danish weight function has to be deemed correct.…”