PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-17:58:00
G08     265.8          18.6                9.4 +/-    2.09      21.4 +/-    2.09  0.130 / 0.320
G10     60.8           58.1               11.4 +/-    1.47      13.2 +/-    1.47  0.110 / 0.280
G11     311.2          17.8                4.8 +/-    2.11      11.1 +/-    2.11  0.030 / 0.020
G14     266.0          66.6               11.8 +/-    0.95      12.8 +/-    0.95  0.030 / 0.030
G18     311.5          34.3                9.0 +/-    0.68      14.4 +/-    0.68  0.250 / 0.240
G20     94.9           36.9               11.6 +/-    0.87      17.7 +/-    0.87  0.130 / 0.220
G21     153.8          13.0                9.3 +/-    3.27      24.2 +/-    3.27  0.060 / 0.050
G27     234.7          17.0                8.6 +/-    1.54      20.3 +/-    1.54  0.070 / 0.060
G31     181.1          26.5               10.8 +/-    1.61      20.5 +/-    1.61  0.210 / 0.210
G32     332.4          74.7               11.5 +/-    0.32      11.8 +/-    0.32  0.160 / 0.300