PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-01:57:30
G02     331.6          80.7                6.5 +/-    0.41       6.6 +/-    0.41  0.040 / 0.010
G05     164.8          30.4               11.6 +/-    2.04      20.0 +/-    2.04  0.030 / 0.010
G06     40.7           44.3                6.9 +/-    0.77       9.5 +/-    0.77  0.100 / 0.050
G12     316.5          66.5                8.5 +/-    1.05       9.1 +/-    1.05  0.110 / 0.060
G17     80.9           17.7                7.1 +/-    2.31      16.6 +/-    2.31  0.050 / 0.020
G19     70.8           30.5                7.2 +/-    2.60      12.6 +/-    2.60  0.040 / 0.020
G24     231.9          25.6               11.4 +/-    1.66      22.0 +/-    1.66  0.110 / 0.210
G25     317.8          24.2                6.4 +/-    1.51      12.8 +/-    1.51  0.140 / 0.120