PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/17-04:27:50
G02     8.5            72.9                4.3 +/-    0.42       4.5 +/-    0.42  0.020 / 0.030
G05     159.7          40.7                7.4 +/-    0.47      10.6 +/-    0.47  0.020 / 0.030
G06     43.2           35.8                4.9 +/-    1.56       7.7 +/-    1.56  0.040 / 0.060
G12     297.9          75.7                4.8 +/-    0.92       5.0 +/-    0.92  0.040 / 0.060
G17     90.2           10.2                6.5 +/-    2.37      18.0 +/-    2.37  0.170 / 0.250
G19     80.7           23.7                6.1 +/-    1.78      12.3 +/-    1.78  0.150 / 0.250
G24     224.2          18.5                6.3 +/-    2.71      14.5 +/-    2.71  0.170 / 0.270
G25     316.0          33.7                3.5 +/-    1.03       5.7 +/-    1.03  0.120 / 0.210
G29     291.0          12.9                5.7 +/-    1.86      14.9 +/-    1.86  0.070 / 0.110