PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-01:27:50
G03     233.8          66.3                3.3 +/-    1.02       3.5 +/-    1.02  0.040 / 0.050
G09     305.2          20.5                3.7 +/-    1.04       8.1 +/-    1.04  0.060 / 0.050
G14     102.5          11.8                4.2 +/-    2.12      11.4 +/-    2.12  0.090 / 0.180
G16     132.5          60.4                6.1 +/-    0.72       6.9 +/-    0.72  0.090 / 0.150
G22     194.3          53.2                5.3 +/-    1.43       6.4 +/-    1.43  0.030 / 0.050
G23     320.6          50.3                1.9 +/-    0.90       2.4 +/-    0.90  0.030 / 0.050
G26     68.3           52.7                2.5 +/-    0.84       3.1 +/-    0.84  0.110 / 0.520
G31     52.7           20.3                0.9 +/-    1.09       1.9 +/-    1.09  0.100 / 0.540