PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-18:57:50
G01     121.0          16.5               13.4 +/-    1.60      32.2 +/-    1.60  0.050 / 0.080
G07     73.7           67.9               12.0 +/-    0.61      12.8 +/-    0.61  0.040 / 0.070
G08     47.1           36.4               10.0 +/-    0.88      15.4 +/-    0.88  0.100 / 0.210
G09     177.6          28.6               14.1 +/-    1.64      25.4 +/-    1.64  0.080 / 0.250
G11     111.3          39.0               14.2 +/-    0.47      21.0 +/-    0.47  0.030 / 0.040
G13     318.8          17.4                9.3 +/-    1.66      21.7 +/-    1.66  0.030 / 0.050
G17     202.4          18.8               13.8 +/-    1.12      31.2 +/-    1.12  0.040 / 0.100
G18     97.0           20.0               12.2 +/-    0.91      26.8 +/-    0.91  0.040 / 0.090
G28     289.3          56.7               12.2 +/-    0.64      14.3 +/-    0.64  0.050 / 0.070
G30     345.9          67.8                9.3 +/-    1.00      10.0 +/-    1.00  0.040 / 0.070