PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-01:12:30
G02     353.6          77.2                6.6 +/-    0.94       6.7 +/-    0.94  0.020 / 0.040
G05     162.3          35.8               14.6 +/-    0.83      22.8 +/-    0.83  0.020 / 0.040
G06     42.1           38.7                5.9 +/-    1.04       8.7 +/-    1.04  0.040 / 0.090
G12     309.0          72.5                8.1 +/-    0.92       8.4 +/-    0.92  0.040 / 0.080
G17     85.8           13.9               10.0 +/-    0.85      25.6 +/-    0.85  0.120 / 0.230
G19     75.8           27.4                9.4 +/-    0.73      17.5 +/-    0.73  0.140 / 0.200
G24     227.3          21.8               14.9 +/-    2.11      31.4 +/-    2.11  0.100 / 0.140
G25     317.1          29.3                7.0 +/-    1.43      12.4 +/-    1.43  0.090 / 0.130