Summary:

Operation of the contemporary permanent GNSS reference station boils down to continuous recording of satellite signals with the set measurement interval at the point with precisely determined coordinates. The recorded observations are controlled, next they are processed and, at the next stage, they are made available to the interested users in the form of various services the basic task of which is to support satellite measurements carried out by means of different techniques and requiring various accuracy levels. KRUR permanent station constitutes an example of a local station making observations of GPS and GLONASS systems satellite signals. It started to operate on 1 November 2009 and it has been in continuous operation since then. The receiving antenna (GPS + GLONASS) is placed on an observation pillar built especially for that purpose in Building C at the Faculty of Environmental Engineering and Surveying of Agricultural University in Krakow. KRUR station is equipped with a multi-frequency and multi-system GPS and GLONASS signal receiver and Zephyr Geodetic 2 antenna. Measurements of satellite signals are made every 1 s. Owing to such continuity of satellite signal measurements, it was possible to set time coordinate series (sequences) with the resolution of 1 h. Such series were determined on the basis of the ASG-EUPOS system and they contain local characteristics of various factors affecting the quality of subsequent solutions. The analysis of the acquired results provides a lot of in-formation about the accuracy, reliability and effectiveness of coordinate solutions in given time intervals.