Summary:

The paper deals with effects of prolonged measuring time of observation in case of fixing single point position with RTK GPS in co-operatin with active geodetic network ASG-EUPOS. The conclusions are based on 2 independent research works done specially to solve this problem.
Both investigations show clear dependence between the time of measurement and the accuracy of positioning in case of single reference ASG-EUPOS station at the distance less than 5 km.
For distances longer than 10 km; when the impact of distance dependent errors prevails, it is not recommended to extend measuring time over 10 seconds.
Further investigations should be done to show more precisely to what extend (between 5 and 10 km) is it worth to extend the time of measurement.