PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-05:42:40
G01     89.5           31.9                6.0 +/-    1.10      10.1 +/-    1.10  0.060 / 0.040
G07     126.1          44.4                8.6 +/-    0.79      11.7 +/-    0.79  0.050 / 0.040
G11     68.8           39.4                5.6 +/-    1.22       8.3 +/-    1.22  0.050 / 0.040
G13     295.3          35.3                6.3 +/-    3.79       9.9 +/-    3.79  0.040 / 0.040
G15     314.7          10.7               -7.5 +/-   13.39     -20.7 +/-   13.39  0.160 / 0.200
G17     215.0          55.2                7.6 +/-    0.83       9.1 +/-    0.83  0.050 / 0.040
G19     214.8          28.8                7.5 +/-    1.28      13.4 +/-    1.28  0.040 / 0.030
G28     351.9          61.6                3.8 +/-    0.25       4.2 +/-    0.25  0.090 / 0.090
G30     107.6          74.0                7.0 +/-    0.86       7.3 +/-    0.86  0.090 / 0.100