The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.Enhanced position accuracy is key for modern navigation systems, location based
services and applications based on Inter-Vehicle Communication (IVC). Position data are
the foundation for deriving vehicle trajectories used for assessing a situation's criticality in
vehicle safety. Thus, especially Advanced Driver Assistance Systems (ADASs) and integral
safety applications bene t from nearby vehicles spreading their positions periodically with high
accuracy. Positioning based on Global Navigation Satellite System (GNSS) measurements can
be enhanced by established Cooperative Positioning (CP) methods like Real-Time Kinematic
(RTK) and Di fferential GNSS (DGNSS). Conventional CP relies on positioning correction
data from a third party, whereas this paper introduces a self-su fficient CP system based on
Precise Point Positioning (PPP) and Vehicular Ad-Hoc Network (VANET) technology requiring
no infrastructure. Furthermore, the data dissemination process and achievable coverage are
analysed by a simulation study for a rural area in Bavaria, Germany. For this purpose, the
simulation employs the European IVC protocol stack ITS-G5. While the general feasibility of
this CP approach could be assured, some remaining issues regarding employed network protocols
were discovered as well