PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-08:42:50
G01     121.4          16.1                5.0 +/-    1.09      12.2 +/-    1.09  0.030 / 0.030
G07     75.5           67.1                6.2 +/-    0.44       6.7 +/-    0.44  0.020 / 0.030
G08     45.3           31.8                3.2 +/-    1.08       5.3 +/-    1.08  0.030 / 0.030
G09     173.6          23.8                7.6 +/-    1.40      15.3 +/-    1.40  0.030 / 0.030
G11     108.3          39.0                7.0 +/-    0.53      10.3 +/-    0.53  0.150 / 0.190
G13     318.7          17.7                3.4 +/-    2.39       7.8 +/-    2.39  0.120 / 0.180
G17     200.3          23.6                6.4 +/-    2.93      13.0 +/-    2.93  0.240 / 0.280
G18     95.3           19.7                4.6 +/-    1.32      10.2 +/-    1.32  0.180 / 0.260
G28     286.4          55.6                6.1 +/-    2.40       7.2 +/-    2.40  0.090 / 0.180
G30     339.3          65.2                5.2 +/-    0.60       5.7 +/-    0.60  0.090 / 0.220