PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/12-08:57:50
G01     87.8           32.3                4.7 +/-    1.52       7.9 +/-    1.52  0.020 / 0.020
G07     127.5          42.6                7.8 +/-    0.78      10.9 +/-    0.78  0.020 / 0.020
G11     64.8           38.1                6.0 +/-    1.27       9.0 +/-    1.27  0.060 / 0.050
G13     291.8          36.9                9.2 +/-    2.00      14.1 +/-    2.00  0.050 / 0.060
G17     215.5          57.9                9.2 +/-    0.96      10.6 +/-    0.96  0.070 / 0.090
G18     60.0           22.5                4.2 +/-    1.59       8.8 +/-    1.59  0.070 / 0.120
G19     215.7          25.3                8.5 +/-    2.77      16.4 +/-    2.77  0.090 / 0.170
G28     350.4          61.7                5.2 +/-    0.64       5.8 +/-    0.64  0.080 / 0.190
G30     108.0          76.4                7.2 +/-    0.39       7.4 +/-    0.39  0.080 / 0.150