PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/30-02:12:50
G01     226.0          16.7                4.3 +/-    1.67      10.2 +/-    1.67  0.040 / 0.030
G03     288.7          66.5                3.0 +/-    0.62       3.3 +/-    0.62  0.030 / 0.030
G14     87.6           23.0                2.2 +/-    0.96       4.6 +/-    0.96  0.040 / 0.070
G16     153.2          42.8                6.8 +/-    0.83       9.4 +/-    0.83  0.040 / 0.090
G22     218.6          70.9                4.7 +/-    0.91       4.9 +/-    0.91  0.120 / 0.290
G23     306.7          36.2                3.3 +/-    0.86       5.2 +/-    0.86  0.110 / 0.250
G26     104.7          55.4                3.6 +/-    0.55       4.2 +/-    0.55  0.040 / 0.090
G31     43.8           36.3                1.6 +/-    0.39       2.5 +/-    0.39  0.040 / 0.070