PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-02:28:10
G08     298.4          22.6                6.2 +/-    0.95      12.7 +/-    0.95  0.070 / 0.120
G10     355.7          62.5                6.9 +/-    0.78       7.7 +/-    0.78  0.060 / 0.120
G14     225.3          39.6               11.1 +/-    2.27      16.2 +/-    2.27  0.070 / 0.140
G20     9.5            65.8                8.3 +/-    0.55       9.0 +/-    0.55  0.080 / 0.110
G21     143.6          46.9               10.0 +/-    1.03      13.1 +/-    1.03  0.050 / 0.110
G24     60.1           26.9                7.2 +/-    1.04      13.5 +/-    1.04  0.070 / 0.090
G27     260.7          34.2               10.0 +/-    1.22      16.0 +/-    1.22  0.030 / 0.030
G32     237.2          65.1               12.2 +/-    0.68      13.3 +/-    0.68  0.040 / 0.030