PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-15:12:40
G01     86.5           32.5               11.6 +/-    0.88      19.3 +/-    0.88  0.030 / 0.030
G07     128.2          42.9               13.3 +/-    1.12      18.5 +/-    1.12  0.030 / 0.030
G11     64.8           38.2               10.0 +/-    0.68      15.0 +/-    0.68  0.070 / 0.110
G13     290.8          37.0               11.2 +/-    0.68      17.1 +/-    0.68  0.090 / 0.110
G17     217.0          56.3               13.0 +/-    0.82      15.3 +/-    0.82  0.060 / 0.090
G18     60.5           23.1                8.5 +/-    0.77      17.4 +/-    0.77  0.070 / 0.090
G19     216.3          27.2               12.1 +/-    1.28      22.5 +/-    1.28  0.040 / 0.070
G28     355.0          61.5               11.6 +/-    0.92      12.9 +/-    0.92  0.030 / 0.060
G30     112.5          74.5               13.8 +/-    1.18      14.3 +/-    1.18  0.050 / 0.060