PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-12:27:50
G01     96.2           30.1                3.5 +/-    1.18       6.1 +/-    1.18  0.040 / 0.060
G07     120.3          49.8                3.3 +/-    0.61       4.2 +/-    0.61  0.030 / 0.030
G08     41.8           10.0                5.5 +/-    1.97      15.3 +/-    1.97  0.040 / 0.050
G11     73.5           40.8                4.5 +/-    0.85       6.5 +/-    0.85  0.050 / 0.050
G13     300.0          34.3                4.4 +/-    1.86       7.1 +/-    1.86  0.080 / 0.150
G17     210.4          49.8                4.2 +/-    1.86       5.4 +/-    1.86  0.080 / 0.110
G18     68.6           24.3                4.3 +/-    1.77       8.6 +/-    1.77  0.080 / 0.160
G19     212.8          19.0                2.1 +/-    2.49       4.7 +/-    2.49  0.070 / 0.170
G28     338.1          61.9                2.1 +/-    0.55       2.4 +/-    0.55  0.060 / 0.140
G30     73.1           80.2                4.5 +/-    0.70       4.6 +/-    0.70  0.080 / 0.150