Dual Frequency GPS+GLONASS Measurements in the Static Relative Positioning

The operative advantages obtained using dual-frequency GPS + GLONASS receivers are well known. In this paper, the aspect of accuracy advantage in the baseline and network vertex computation are investigated. This was applied to two study cases: a small-scale urban network and a small-scale continental network. The processing of data was performed in different conditions using both GPS Ll/L2 measurements, GPS+GLONASS Ll/L2 and GPS Ll/L2 plus GLONASS Ll measurements. The obtained values of baseline components were compared and the statistic parameters analysed. The results showed a good improvement in the obtained accuracy in terms of error ellipses semi-axis dimensions and in the rms height values. In the case of GPS+GLONASS LlIL2 measurements, the semi-axis of the ellipses and the ellipsoidal height rms are almost half with respect to that obtained with GPS Ll/L2 measurements.