PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-18:12:30
G08     301.3          21.7                9.4 +/-    1.73      19.8 +/-    1.73  0.050 / 0.090
G10     348.7          62.0                7.7 +/-    0.56       8.6 +/-    0.56  0.060 / 0.080
G14     223.8          39.4               13.2 +/-    2.20      19.4 +/-    2.20  0.040 / 0.070
G18     54.8           54.0                8.1 +/-    0.58       9.8 +/-    0.58  0.050 / 0.090
G21     140.9          42.6               12.6 +/-    1.56      17.6 +/-    1.56  0.050 / 0.090
G24     65.1           29.2                8.7 +/-    0.43      15.5 +/-    0.43  0.060 / 0.090
G27     261.9          35.0               12.3 +/-    0.90      19.5 +/-    0.90  0.070 / 0.120
G32     233.0          59.7               12.0 +/-    0.63      13.7 +/-    0.63  0.050 / 0.120