PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-14:58:10
G01     85.2           32.7                8.0 +/-    1.79      13.3 +/-    1.79  0.020 / 0.030
G07     129.2          41.9                9.7 +/-    0.95      13.7 +/-    0.95  0.020 / 0.030
G11     63.6           37.5                8.5 +/-    1.48      12.9 +/-    1.48  0.040 / 0.050
G13     289.5          37.2               13.0 +/-    1.86      19.8 +/-    1.86  0.050 / 0.050
G17     217.9          57.7               10.5 +/-    0.92      12.2 +/-    0.92  0.070 / 0.090
G18     59.4           22.7                7.4 +/-    2.27      15.3 +/-    2.27  0.080 / 0.100
G19     216.8          28.2               10.5 +/-    1.66      19.1 +/-    1.66  0.080 / 0.160
G28     357.1          61.4                8.8 +/-    0.76       9.8 +/-    0.76  0.090 / 0.210
G30     115.3          73.8                9.5 +/-    0.58       9.9 +/-    0.58  0.050 / 0.100