PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-14:27:50
G03     235.4          68.7               10.3 +/-    0.29      11.0 +/-    0.29  0.050 / 0.050
G09     302.5          16.8                7.6 +/-    1.32      18.2 +/-    1.32  0.040 / 0.060
G14     97.5           18.6                7.7 +/-    1.34      17.6 +/-    1.34  0.080 / 0.210
G16     126.1          58.5               10.5 +/-    0.45      12.1 +/-    0.45  0.100 / 0.230
G22     188.5          52.8               11.7 +/-    0.97      14.3 +/-    0.97  0.030 / 0.030
G23     322.4          52.4                8.6 +/-    0.48      10.6 +/-    0.48  0.030 / 0.030
G26     68.8           50.9                8.1 +/-    0.58      10.1 +/-    0.58  0.030 / 0.040
G31     52.2           18.7                6.3 +/-    2.53      14.3 +/-    2.53  0.030 / 0.040