PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-03:27:40
G02     49.4           40.9                5.9 +/-    1.10       8.5 +/-    1.10  0.170 / 0.400
G05     86.2           68.2                6.1 +/-    0.62       6.5 +/-    0.62  0.240 / 0.310
G12     188.4          48.0                7.9 +/-    0.59      10.2 +/-    0.59  0.030 / 0.050
G20     211.8          15.0                5.5 +/-    2.49      13.6 +/-    2.49  0.030 / 0.040
G25     264.2          57.9                8.6 +/-    0.55       9.9 +/-    0.55  0.020 / 0.030
G29     319.1          41.7                8.3 +/-    0.95      11.8 +/-    0.95  0.020 / 0.030