PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-07:58:00
G02     201.5          32.4                6.5 +/-    0.98      10.8 +/-    0.98  0.070 / 0.130
G06     173.9          60.8                8.0 +/-    1.18       9.0 +/-    1.18  0.060 / 0.110
G12     305.2          11.1               -1.7 +/-   15.43      -4.6 +/-   15.43  0.050 / 0.100
G17     33.5           51.3                2.4 +/-    0.41       3.0 +/-    0.41  0.050 / 0.080
G19     356.4          66.8                2.5 +/-    0.45       2.7 +/-    0.45  0.110 / 0.270
G24     303.0          35.2                4.0 +/-    0.92       6.4 +/-    0.92  0.110 / 0.270
G28     99.4           32.9                6.5 +/-    1.83      10.6 +/-    1.83  0.030 / 0.040