PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-18:57:40
G01     119.5          17.7               13.3 +/-    1.42      30.9 +/-    1.42  0.040 / 0.060
G07     78.6           67.1               10.2 +/-    0.44      11.0 +/-    0.44  0.040 / 0.060
G08     46.1           34.8                8.9 +/-    0.35      14.2 +/-    0.35  0.120 / 0.290
G09     177.4          26.8               12.9 +/-    1.49      24.2 +/-    1.49  0.130 / 0.300
G11     109.0          39.8               13.1 +/-    1.25      19.2 +/-    1.25  0.030 / 0.040
G13     318.0          18.9               10.0 +/-    1.84      22.6 +/-    1.84  0.020 / 0.040
G17     202.8          20.6               13.6 +/-    2.08      29.5 +/-    2.08  0.040 / 0.060
G18     95.2           20.7               11.7 +/-    0.76      25.2 +/-    0.76  0.040 / 0.050
G28     292.6          57.4               12.0 +/-    0.85      14.0 +/-    0.85  0.040 / 0.090
G30     349.1          69.2                9.7 +/-    0.74      10.3 +/-    0.74  0.040 / 0.080