PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-16:57:50
G08     268.8          19.9                7.6 +/-    3.33      16.7 +/-    3.33  0.030 / 0.030
G10     55.1           59.2               10.2 +/-    0.68      11.6 +/-    0.68  0.030 / 0.020
G11     313.2          15.9               -6.2 +/-    3.61     -15.0 +/-    3.61  0.120 / 0.370
G14     259.5          64.8               10.7 +/-    0.71      11.6 +/-    0.71  0.140 / 0.390
G18     313.0          32.1                7.5 +/-    1.00      12.6 +/-    1.00  0.070 / 0.050
G20     91.8           38.9               10.4 +/-    1.43      15.4 +/-    1.43  0.070 / 0.060
G21     153.1          15.3               12.0 +/-    1.92      29.6 +/-    1.92  0.230 / 0.410
G27     237.3          19.1                8.8 +/-    1.96      19.7 +/-    1.96  0.080 / 0.360
G31     182.2          22.7               11.9 +/-    2.88      24.6 +/-    2.88  0.130 / 0.320
G32     318.2          75.5                9.8 +/-    0.38      10.1 +/-    0.38  0.060 / 0.120