PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-00:57:40
G02     350.1          77.6                7.4 +/-    0.47       7.6 +/-    0.47  0.030 / 0.030
G05     162.9          34.8               12.7 +/-    1.13      20.2 +/-    1.13  0.030 / 0.040
G06     40.5           42.6                7.1 +/-    0.55       9.9 +/-    0.55  0.120 / 0.160
G12     312.2          68.9                6.7 +/-    0.61       7.2 +/-    0.61  0.120 / 0.190
G17     86.6           10.3                7.3 +/-    2.06      20.2 +/-    2.06  0.050 / 0.080
G19     75.4           26.4                9.1 +/-    1.20      17.3 +/-    1.20  0.060 / 0.090
G24     226.7          21.8               10.3 +/-    1.65      21.7 +/-    1.65  0.060 / 0.130
G25     316.8          30.2                8.0 +/-    0.96      14.0 +/-    0.96  0.060 / 0.120
G29     287.9          12.7               10.7 +/-    1.62      28.1 +/-    1.62  0.070 / 0.140