PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-14:42:40
G01     127.4          11.4                1.6 +/-   42.00       4.3 +/-   42.00  0.030 / 0.030
G07     50.9           69.7               10.3 +/-    0.47      10.9 +/-    0.47  0.030 / 0.040
G08     51.0           40.2                9.0 +/-    0.63      13.0 +/-    0.63  0.030 / 0.040
G09     177.4          35.5               12.8 +/-    0.78      20.1 +/-    0.78  0.040 / 0.050
G11     118.7          35.0               10.2 +/-    0.85      16.2 +/-    0.85  0.120 / 0.340
G13     321.2          11.4                0.7 +/-   23.95       1.8 +/-   23.95  0.130 / 0.350
G17     200.2          13.6                8.8 +/-    1.56      22.6 +/-    1.56  0.040 / 0.080
G18     104.1          16.4               10.0 +/-    0.88      24.0 +/-    0.88  0.040 / 0.070
G28     275.6          52.7               10.3 +/-    0.91      12.6 +/-    0.91  0.080 / 0.360
G30     332.1          59.9                9.1 +/-    0.89      10.4 +/-    0.89  0.080 / 0.400