PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-14:13:10
G01     96.4           30.1                9.3 +/-    0.75      16.2 +/-    0.75  0.020 / 0.040
G07     120.1          50.2                9.3 +/-    0.41      11.6 +/-    0.41  0.020 / 0.030
G08     41.9           11.2                8.8 +/-    3.74      23.8 +/-    3.74  0.060 / 0.130
G11     74.4           41.2               10.5 +/-    0.64      15.0 +/-    0.64  0.060 / 0.130
G13     300.3          34.2                8.4 +/-    1.11      13.5 +/-    1.11  0.040 / 0.070
G17     210.8          48.4               12.2 +/-    1.49      15.7 +/-    1.49  0.040 / 0.070
G18     69.1           24.4                9.4 +/-    0.56      18.5 +/-    0.56  0.040 / 0.070
G19     212.7          19.4                6.2 +/-    2.37      13.8 +/-    2.37  0.040 / 0.070
G28     338.0          61.9                8.0 +/-    0.51       9.0 +/-    0.51  0.030 / 0.060
G30     75.7           79.8                9.0 +/-    0.66       9.2 +/-    0.66  0.030 / 0.050