PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-03:12:40
G01     68.2           32.6                4.1 +/-    1.25       6.8 +/-    1.25  0.030 / 0.060
G07     138.7          29.0                6.1 +/-    0.93      10.9 +/-    0.93  0.030 / 0.050
G11     53.5           30.6                4.1 +/-    1.05       7.1 +/-    1.05  0.040 / 0.070
G13     272.8          36.9                5.0 +/-    2.37       7.6 +/-    2.37  0.040 / 0.080
G15     299.9          16.2                2.8 +/-    2.53       6.7 +/-    2.53  0.050 / 0.080
G17     237.8          70.4                5.9 +/-    0.45       6.2 +/-    0.45  0.070 / 0.090
G19     226.1          44.8                5.8 +/-    1.76       7.8 +/-    1.76  0.030 / 0.030
G28     24.8           58.4                4.8 +/-    1.93       5.6 +/-    1.93  0.030 / 0.030
G30     137.2          55.8                6.3 +/-    0.45       7.5 +/-    0.45  0.120 / 0.250