PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-00:12:30
G02     214.1          59.6               12.5 +/-    0.61      14.2 +/-    0.61  0.030 / 0.030
G06     63.0           75.8               10.8 +/-    0.53      11.1 +/-    0.53  0.040 / 0.030
G12     317.9          34.2                9.1 +/-    1.15      14.6 +/-    1.15  0.090 / 0.100
G17     53.1           37.2               10.4 +/-    1.32      15.9 +/-    1.32  0.070 / 0.090
G19     36.1           51.1               10.5 +/-    1.78      13.0 +/-    1.78  0.080 / 0.070
G24     268.1          41.9               11.6 +/-    1.93      16.4 +/-    1.93  0.080 / 0.060
G28     121.5          14.7               14.8 +/-    1.55      37.1 +/-    1.55  0.180 / 0.350