PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-08:13:00
G01     61.1           30.8                4.1 +/-    0.87       7.1 +/-    0.87  0.040 / 0.050
G06     182.7          11.6               -3.0 +/-   26.57      -8.1 +/-   26.57  0.030 / 0.040
G07     141.8          22.2                8.0 +/-    1.61      16.7 +/-    1.61  0.070 / 0.130
G11     48.8           23.9                3.8 +/-    1.58       7.7 +/-    1.58  0.070 / 0.130
G13     265.5          35.2                6.6 +/-    2.19      10.4 +/-    2.19  0.120 / 0.190
G15     294.6          16.6                3.3 +/-    1.06       7.9 +/-    1.06  0.110 / 0.190
G17     260.2          77.3                7.6 +/-    0.39       7.7 +/-    0.39  0.020 / 0.020
G19     232.2          51.5                6.9 +/-    2.33       8.5 +/-    2.33  0.030 / 0.020
G28     35.4           56.6                6.9 +/-    0.99       8.1 +/-    0.99  0.120 / 0.320
G30     142.5          52.7                8.7 +/-    0.28      10.6 +/-    0.28  0.130 / 0.330