PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-18:28:10
G02     24.3           61.9                9.4 +/-    0.59      10.5 +/-    0.59  0.040 / 0.070
G05     148.3          57.0               10.4 +/-    0.61      12.2 +/-    0.61  0.030 / 0.030
G06     51.6           18.0                7.6 +/-    1.78      17.7 +/-    1.78  0.090 / 0.110
G12     194.4          70.6                8.4 +/-    0.63       8.9 +/-    0.63  0.050 / 0.070
G19     94.3           16.0                8.4 +/-    1.43      20.3 +/-    1.43  0.020 / 0.030
G25     303.3          50.6                9.2 +/-    3.73      11.5 +/-    3.73  0.030 / 0.030
G29     302.8          22.8                8.3 +/-    1.28      17.1 +/-    1.28  0.130 / 0.210