PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-09:42:40
G02     234.7          75.1                8.1 +/-    0.33       8.3 +/-    0.33  0.210 / 0.230
G05     173.2          13.4                6.6 +/-    4.04      17.0 +/-    4.04  0.210 / 0.230
G06     41.1           67.4                5.1 +/-    0.50       5.5 +/-    0.50  0.030 / 0.050
G12     321.1          47.4                5.0 +/-    0.55       6.6 +/-    0.55  0.030 / 0.040
G17     69.3           23.2                4.2 +/-    0.82       8.6 +/-    0.82  0.020 / 0.020
G19     55.4           39.4                4.2 +/-    1.53       6.2 +/-    1.53  0.020 / 0.020
G24     250.1          36.5                8.2 +/-    1.58      12.6 +/-    1.58  0.030 / 0.030