PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/21-02:28:10
G02     22.8           64.1                4.4 +/-    0.67       4.8 +/-    0.67  0.170 / 0.090
G05     151.8          51.7                7.9 +/-    0.52       9.8 +/-    0.52  0.160 / 0.090
G06     47.8           25.3                4.1 +/-    1.76       7.9 +/-    1.76  0.020 / 0.020
G12     235.7          78.7                6.0 +/-    0.38       6.1 +/-    0.38  0.030 / 0.030
G19     89.9           17.8                5.2 +/-    1.53      12.1 +/-    1.53  0.030 / 0.040
G24     216.4          11.0               10.0 +/-    7.74      27.4 +/-    7.74  0.040 / 0.040
G25     310.6          43.4                5.5 +/-    0.84       7.6 +/-    0.84  0.330 / 0.340
G29     298.6          19.1                4.6 +/-    0.92      10.4 +/-    0.92  0.350 / 0.520