PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/04-09:12:30
G02     204.0          40.4                6.4 +/-    1.09       9.3 +/-    1.09  0.070 / 0.130
G06     166.0          70.4                7.7 +/-    0.35       8.1 +/-    0.35  0.070 / 0.160
G12     309.6          17.2                4.6 +/-    2.95      10.9 +/-    2.95  0.050 / 0.040
G17     41.1           45.1                4.0 +/-    0.96       5.3 +/-    0.96  0.040 / 0.040
G19     13.0           61.8                4.6 +/-    0.48       5.1 +/-    0.48  0.110 / 0.160
G24     294.6          39.1                3.5 +/-    2.23       5.2 +/-    2.23  0.270 / 0.160
G28     107.0          27.7                7.4 +/-    1.78      13.6 +/-    1.78  0.040 / 0.020