PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-19:42:50
G05     48.5           19.1               10.6 +/-    1.75      23.9 +/-    1.75  0.040 / 0.070
G10     236.4          12.9                4.4 +/-   29.99      11.5 +/-   29.99  0.040 / 0.080
G13     75.0           36.1               10.3 +/-    1.08      16.0 +/-    1.08  0.160 / 0.340
G15     132.8          51.6               11.7 +/-    0.44      14.5 +/-    0.44  0.100 / 0.360
G16     313.3          12.9                8.7 +/-    2.42      22.8 +/-    2.42  0.180 / 0.130
G20     248.4          37.1               12.2 +/-    1.75      18.7 +/-    1.75  0.120 / 0.120
G21     313.6          47.2               11.3 +/-    0.98      14.7 +/-    0.98  0.070 / 0.090
G26     286.8          20.4               12.4 +/-    1.67      27.0 +/-    1.67  0.080 / 0.090
G29     155.8          72.7               12.2 +/-    0.41      12.8 +/-    0.41  0.040 / 0.050