a, b: Phase scintillation observed at TRO2. The red line shows the mean value, while the colored background is a heatmap of the values. c, d: Error in the vertical coordinate, for MTRM (c) and TM01 (d). e, f: Number of fix solutions (red line) and number of satellites used for position calculation (blue line), for MTRM (e) and TM01 (f). Note that the normal level for the fix solution parameter is different for different receivers (more details in the text). g, h: Error in the vertical coordinate, for TM04 (g) and TM05 (h). i, j: Number of fix solutions (red line) and number of satellites used for position calculation (blue line), for TM04 (i) and TM05 (j).