PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-17:58:10
G07     27.0           69.3               12.5 +/-    0.67      13.3 +/-    0.67  0.040 / 0.050
G08     60.1           47.8               11.0 +/-    0.95      14.3 +/-    0.95  0.040 / 0.050
G09     179.5          45.0               15.3 +/-    1.02      20.6 +/-    1.02  0.020 / 0.030
G11     127.5          30.1               14.8 +/-    1.31      25.8 +/-    1.31  0.030 / 0.040
G18     111.3          12.5               12.7 +/-    1.51      33.5 +/-    1.51  0.330 / 0.400
G23     158.7          10.8               15.3 +/-    4.09      42.0 +/-    4.09  0.290 / 0.520
G27     38.8           13.2                8.3 +/-    2.32      21.6 +/-    2.32  0.160 / 0.350
G28     265.1          48.6               13.9 +/-    3.73      17.8 +/-    3.73  0.150 / 0.350
G30     325.8          55.1               11.7 +/-    0.56      14.0 +/-    0.56  0.080 / 0.140