PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-12:13:00
G01     103.7          27.2                2.9 +/-    1.22       5.4 +/-    1.22  0.020 / 0.020
G07     111.8          55.5               12.2 +/-    8.93      14.5 +/-    8.93  0.030 / 0.020
G08     41.5           15.7                2.6 +/-    2.24       6.3 +/-    2.24  0.040 / 0.040
G11     82.7           42.2               11.0 +/-    9.22      15.5 +/-    9.22  0.040 / 0.030
G13     306.7          30.9                8.4 +/-    9.53      14.4 +/-    9.53  0.060 / 0.140
G17     206.7          42.7               10.7 +/-    9.34      14.9 +/-    9.34  0.070 / 0.110
G18     76.1           24.4                4.1 +/-    1.91       8.1 +/-    1.91  0.110 / 0.160
G19     210.5          12.8                0.2 +/-    1.86       0.6 +/-    1.86  0.070 / 0.130
G28     324.0          61.4                9.7 +/-    8.40      10.9 +/-    8.40  0.070 / 0.130
G30     30.3           79.4                3.7 +/-    0.32       3.8 +/-    0.32  0.060 / 0.120