PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-23:43:10
G07     328.5          56.1                8.6 +/-    0.46      10.1 +/-    0.46  0.130 / 0.140
G08     106.2          51.1               10.9 +/-    0.41      13.6 +/-    0.41  0.080 / 0.190
G09     201.7          77.4                9.2 +/-    0.40       9.4 +/-    0.40  0.060 / 0.080
G11     149.3          10.6               -0.1 +/-   20.11      -0.2 +/-   20.11  0.060 / 0.050
G16     45.8           11.1                6.4 +/-    2.62      17.6 +/-    2.62  0.190 / 0.470
G23     154.2          44.3               12.0 +/-    0.86      16.4 +/-    0.86  0.160 / 0.340
G27     57.2           32.5                6.9 +/-    1.04      11.6 +/-    1.04  0.040 / 0.040
G28     235.3          27.9                8.7 +/-    1.68      16.0 +/-    1.68  0.030 / 0.040
G30     301.7          36.2                9.5 +/-    1.49      14.8 +/-    1.49  0.040 / 0.040