PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-01:28:00
G02     337.0          80.1                8.6 +/-    0.71       8.8 +/-    0.71  0.020 / 0.070
G05     164.3          31.6               15.1 +/-    1.37      25.6 +/-    1.37  0.030 / 0.040
G06     41.0           42.9                8.2 +/-    0.56      11.4 +/-    0.56  0.040 / 0.100
G12     315.3          68.1                8.2 +/-    0.91       8.8 +/-    0.91  0.040 / 0.100
G17     82.1           16.7               10.9 +/-    1.11      26.0 +/-    1.11  0.030 / 0.030
G19     71.8           29.9               10.4 +/-    1.05      18.2 +/-    1.05  0.030 / 0.040
G24     230.8          24.8               12.7 +/-    0.92      25.0 +/-    0.92  0.100 / 0.190
G25     317.7          25.3                8.5 +/-    1.81      16.4 +/-    1.81  0.080 / 0.160