TESTING METHODS WITH DIFFERENT DEGREES OF SAMPLING IN DETERMINING SYSTEMATIC INFLUENCES AND MEASUREMENT UNCERTAINTIES OF LINEAR MEASURING DEVICES
This work tested several procedures to determine the linear measuring device's systematic influences and measurement uncertainty. Three methods were developed that differ in the degree and density of sampling during measurement and were compared with the existing method used for calibrating linear measuring devices in the Metrology Laboratory accre...
By Miljana Todorović Drakul, Sanja Grekulović, Dušan Petković, Oleg Odalović
VALIDATION OF THE NEQUICK AND IRI MODELS BASED ON DATA FROM IONOSONDES
This study compares the NeQuick and IRI ionospheric models using data from ionosondes as reference. Validation based on data obtained by direct measurement using ionosondes helps to refine empirical models and improves their reliability. In this way, it is possible to identify the differences and limitations of the model and contribute to its impro...
By Slavica Ilijević, Sanja Grekulović, Miljana Todorović Drakul
COMPARISON OF IRI-2016 AND NEQUICK MODELS OF THE IONOSPHERE OVER THE BALKAN PENINSULA DURING THE YEAR 2019
In this paper, a comparative study of the total vertical electron content (VTEC) calculated using the IRI-2016 and NeQuick2 models were performed. The research was done for the days of maximum solar activity in 2019, with data from seven IGS GNNS stations in the region of the Balkan Peninsula. The results show that both models agree quite well with...
By Miljana Todorović Drakul, Sanja Grekulović, Oleg Odalović, Dušan Petković