Abstract: The paper presents and analyzes the values of geometric dilution of precision coefficients calculated by selected GPS system receivers based on three different chipsets. The influence of the number of satellites considered by the receivers in geographic coordinate calculations was confirmed.1. INTRODUCTION
At the end of the first decade of the 21st century, in all branches of transport, object localization is of significant importance both for the safety of traffic participants and for economic reasons. The need to know the position of aircraft in three-dimensional space or sea vessels in two-dimensional space has existed since the beginning of the operation of the transport branches in which they are used. A new trend, observed for over a dozen years, is the interest in determining the precise position of a mobile user in surface transport. Especially since the beginning of the 21st century, when the intentional jamming of the GPS signal was turned off, a rapid increase in interest in using receivers of this system for precise localization of transport means in road transport could be observed. This applies to both public and individual transport.
Private road network users are increasingly showing interest in navigation tools that allow for shortening travel time between two points or optimizing the route between a larger number of them. Using such tools entails measurable benefits related to reducing fuel consumption and shortening travel time. However, the realization of these tasks requires continuous knowledge of the current position of a given user. Such knowledge is particularly important from the point of view of a transport service provider. On one hand, it allows for proper management of the owned fleet, and on the other, it enables its continuous supervision and monitoring. In the case of public transport, it also allows for adjusting
schedules to the situation on the road under specific conditions, and with the use of additional systems, also providing appropriate information for passengers.
There are many solutions ensuring the acquisition of information about the current position of a moving means of transport, however, the most commonly encountered today is the use of satellite navigation systems, in particular the GPS system. (…)
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Source: Logistyka Magazine