PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-19:42:40
G01     88.8           32.2               12.2 +/-    0.86      20.5 +/-    0.86  0.100 / 0.340
G07     126.5          45.0               14.9 +/-    0.78      20.1 +/-    0.78  0.140 / 0.450
G11     68.5           40.1               10.9 +/-    0.57      15.9 +/-    0.57  0.040 / 0.060
G13     293.5          36.2               12.0 +/-    1.29      18.6 +/-    1.29  0.030 / 0.060
G15     314.8          10.3               -7.5 +/-   17.42     -20.8 +/-   17.42  0.080 / 0.120
G17     216.1          50.9               16.4 +/-    1.10      20.4 +/-    1.10  0.080 / 0.130
G18     63.0           23.8                9.7 +/-    0.99      19.4 +/-    0.99  0.040 / 0.060
G19     215.3          27.0               15.2 +/-    1.31      28.4 +/-    1.31  0.040 / 0.060
G28     352.1          61.6               10.3 +/-    0.65      11.6 +/-    0.65  0.060 / 0.080
G30     109.5          74.1               12.8 +/-    0.62      13.3 +/-    0.62  0.070 / 0.090