PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-00:12:50
G01     56.1           28.9                9.7 +/-    1.60      17.4 +/-    1.60  0.060 / 0.090
G06     179.8          18.1               14.8 +/-    1.79      34.2 +/-    1.79  0.130 / 0.090
G07     144.0          19.0               12.2 +/-    1.52      27.4 +/-    1.52  0.030 / 0.020
G11     47.6           22.8                8.0 +/-    1.45      16.5 +/-    1.45  0.020 / 0.020
G13     258.5          33.5               12.2 +/-    2.25      19.9 +/-    2.25  0.130 / 0.220
G15     289.5          16.6               10.1 +/-    0.99      24.2 +/-    0.99  0.160 / 0.200
G17     267.9          75.9               11.6 +/-    0.59      11.9 +/-    0.59  0.040 / 0.050
G19     237.4          54.2               13.0 +/-    2.35      15.6 +/-    2.35  0.040 / 0.040
G28     43.2           55.0                9.7 +/-    1.81      11.5 +/-    1.81  0.090 / 0.180
G30     145.5          45.1               13.6 +/-    0.55      18.3 +/-    0.55  0.110 / 0.210