PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-18:57:30
G02     26.8           60.2                5.8 +/-    0.84       6.6 +/-    0.84  0.040 / 0.040
G05     145.5          59.0                9.7 +/-    0.71      11.2 +/-    0.71  0.040 / 0.040
G06     52.6           16.5                6.3 +/-    0.76      15.2 +/-    0.76  0.040 / 0.040
G12     192.8          68.6                7.1 +/-    0.97       7.6 +/-    0.97  0.060 / 0.040
G19     96.0           14.7                8.7 +/-    0.96      21.7 +/-    0.96  0.050 / 0.070
G25     301.0          51.9                6.4 +/-    0.75       7.8 +/-    0.75  0.040 / 0.060
G29     304.2          24.2                8.7 +/-    1.96      17.2 +/-    1.96  0.090 / 0.170