PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-04:13:00
G01     106.2          26.0                7.7 +/-    1.54      14.7 +/-    1.54  0.040 / 0.040
G07     108.3          57.2                6.8 +/-    0.60       7.9 +/-    0.60  0.040 / 0.050
G08     41.9           19.7                5.1 +/-    1.55      11.3 +/-    1.55  0.060 / 0.060
G09     175.2          13.5                6.2 +/-    0.81      16.1 +/-    0.81  0.070 / 0.060
G11     89.1           42.6                6.3 +/-    0.96       8.8 +/-    0.96  0.110 / 0.280
G13     309.8          28.1                2.8 +/-    1.24       5.0 +/-    1.24  0.110 / 0.120
G17     206.2          39.4                7.1 +/-    1.04      10.5 +/-    1.04  0.150 / 0.210
G19     209.2          14.7                4.7 +/-    1.61      11.7 +/-    1.61  0.210 / 0.210
G28     321.2          61.3                3.1 +/-    0.86       3.5 +/-    0.86  0.070 / 0.130
G30     39.3           78.3                5.2 +/-    0.36       5.3 +/-    0.36  0.100 / 0.110