PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-07:12:30
G02     205.3          40.4                6.7 +/-    0.70       9.7 +/-    0.70  0.050 / 0.050
G06     153.7          73.9                6.8 +/-    0.75       7.1 +/-    0.75  0.040 / 0.050
G12     310.2          19.2                3.5 +/-    1.83       7.9 +/-    1.83  0.030 / 0.020
G17     43.4           42.6                3.6 +/-    2.17       5.1 +/-    2.17  0.030 / 0.020
G19     8.2            62.8                3.9 +/-    0.55       4.3 +/-    0.55  0.130 / 0.160
G24     286.1          43.1               -1.1 +/-    1.61      -1.5 +/-    1.61  0.090 / 0.210
G28     106.9          29.2                7.7 +/-    1.41      13.8 +/-    1.41  0.090 / 0.140