PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-16:42:40
G01     318.2          19.7                5.7 +/-    1.31      12.6 +/-    1.31  0.520 / 0.310
G08     257.0          12.0                6.4 +/-    6.38      17.0 +/-    6.38  0.200 / 0.190
G10     82.8           52.4                7.4 +/-    1.32       9.1 +/-    1.32  0.040 / 0.040
G11     302.8          22.8                6.1 +/-    1.28      12.6 +/-    1.28  0.040 / 0.040
G14     301.7          70.5                6.4 +/-    0.47       6.8 +/-    0.47  0.060 / 0.060
G22     301.9          12.6                5.5 +/-    5.53      14.5 +/-    5.53  0.050 / 0.050
G31     175.6          44.6               10.5 +/-    0.75      14.3 +/-    0.75  0.110 / 0.290
G32     12.2           65.6                6.6 +/-    0.43       7.2 +/-    0.43  0.190 / 0.180