PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/20-06:28:00
G07     17.7           68.1                4.1 +/-    0.93       4.4 +/-    0.93  0.050 / 0.040
G08     61.6           46.5                3.5 +/-    0.35       4.6 +/-    0.35  0.070 / 0.050
G09     175.0          45.6                6.5 +/-    1.58       8.7 +/-    1.58  0.030 / 0.040
G11     129.1          27.7                7.4 +/-    1.11      13.7 +/-    1.11  0.030 / 0.040
G18     113.2          10.0              -10.3 +/-   16.10     -28.7 +/-   16.10  0.100 / 0.150
G23     160.8          21.6                6.5 +/-    1.81      13.8 +/-    1.81  0.080 / 0.120
G27     41.4           19.0                2.5 +/-    0.63       5.6 +/-    0.63  0.160 / 0.390
G28     257.1          43.9                4.3 +/-    1.47       5.8 +/-    1.47  0.070 / 0.170
G30     318.1          48.7                3.8 +/-    0.67       4.9 +/-    0.67  0.090 / 0.170