PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/04-19:58:00
G01     55.4           28.4                9.0 +/-    0.99      16.3 +/-    0.99  0.040 / 0.060
G06     180.2          16.9               10.9 +/-   22.93      26.0 +/-   22.93  0.040 / 0.050
G07     143.0          12.5               11.7 +/-    3.60      30.8 +/-    3.60  0.130 / 0.320
G11     46.0           19.8                9.0 +/-    0.68      19.8 +/-    0.68  0.140 / 0.240
G13     256.6          34.2               11.3 +/-    1.35      18.3 +/-    1.35  0.080 / 0.300
G15     289.0          16.5                8.9 +/-    1.41      21.3 +/-    1.41  0.070 / 0.340
G17     278.2          78.8               12.6 +/-    0.49      12.8 +/-    0.49  0.050 / 0.120
G19     236.7          54.9               12.5 +/-    1.56      14.9 +/-    1.56  0.050 / 0.100
G28     35.0           57.8               11.4 +/-    0.79      13.2 +/-    0.79  0.170 / 0.180
G30     145.9          45.9               13.0 +/-    1.10      17.3 +/-    1.10  0.090 / 0.160