PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-12:27:30
G02     358.8          76.1                2.8 +/-    0.58       2.9 +/-    0.58  0.040 / 0.080
G05     164.3          35.6                8.9 +/-    1.43      14.0 +/-    1.43  0.030 / 0.080
G06     41.4           41.3                2.0 +/-    0.42       2.9 +/-    0.42  0.100 / 0.160
G12     306.5          72.6                2.4 +/-    1.05       2.5 +/-    1.05  0.080 / 0.170
G19     78.9           24.2                4.5 +/-    0.74       9.0 +/-    0.74  0.020 / 0.030
G24     227.4          21.0                5.5 +/-    1.74      11.7 +/-    1.74  0.020 / 0.030
G25     316.6          32.6                4.3 +/-    1.11       7.2 +/-    1.11  0.080 / 0.120
G29     290.7          15.0                3.5 +/-    1.37       8.7 +/-    1.37  0.080 / 0.080