PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-02:57:30
G01     226.0          16.7                4.6 +/-    2.11      10.9 +/-    2.11  0.040 / 0.040
G03     289.1          66.2                3.4 +/-    0.94       3.7 +/-    0.94  0.030 / 0.050
G14     87.7           22.9                3.1 +/-    0.92       6.4 +/-    0.92  0.040 / 0.090
G16     152.4          43.2                9.6 +/-    0.88      13.2 +/-    0.88  0.050 / 0.080
G22     218.5          70.9                4.8 +/-    0.91       5.1 +/-    0.91  0.060 / 0.080
G23     306.7          36.1                4.2 +/-    0.68       6.5 +/-    0.68  0.060 / 0.080
G26     105.8          55.5                5.6 +/-    0.34       6.6 +/-    0.34  0.110 / 0.250
G31     43.9           36.0                2.3 +/-    0.50       3.6 +/-    0.50  0.110 / 0.240