PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-06:58:00
G01     44.2           20.2                2.4 +/-    3.07       5.3 +/-    3.07  0.040 / 0.050
G06     180.1          29.2                6.1 +/-    1.14      10.9 +/-    1.14  0.040 / 0.070
G13     243.8          25.5                5.7 +/-    1.82      11.0 +/-    1.82  0.120 / 0.210
G15     275.3          14.2                3.5 +/-    1.47       8.9 +/-    1.47  0.150 / 0.150
G17     351.3          73.9                5.0 +/-    0.42       5.2 +/-    0.42  0.020 / 0.020
G19     265.3          67.3                7.2 +/-    0.85       7.7 +/-    0.85  0.030 / 0.030
G24     318.4          13.7                2.3 +/-    3.02       5.9 +/-    3.02  0.080 / 0.110
G28     65.3           48.9                4.5 +/-    1.04       5.7 +/-    1.04  0.080 / 0.100
G30     152.4          31.4                6.6 +/-    0.55      11.2 +/-    0.55  0.100 / 0.210