PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-12:42:40
G01     40.8           15.6                2.6 +/-    2.64       6.3 +/-    2.64  0.150 / 0.250
G06     176.0          39.0                7.3 +/-    1.82      10.8 +/-    1.82  0.110 / 0.190
G13     239.0          21.6                5.9 +/-    1.81      12.5 +/-    1.81  0.070 / 0.110
G15     271.2          12.2                7.1 +/-    3.13      18.8 +/-    3.13  0.080 / 0.110
G17     9.1            68.2                5.0 +/-    0.62       5.4 +/-    0.62  0.140 / 0.110
G19     285.0          70.9                6.2 +/-    0.41       6.5 +/-    0.41  0.140 / 0.160
G24     317.0          18.4                3.4 +/-    2.02       7.7 +/-    2.02  0.040 / 0.020
G28     73.3           46.0                5.2 +/-    1.03       6.9 +/-    1.03  0.040 / 0.020
G30     154.9          27.8                7.3 +/-    0.95      13.3 +/-    0.95  0.230 / 0.230