PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-00:42:50
G02     211.7          56.6               13.6 +/-    0.60      16.0 +/-    0.60  0.150 / 0.100
G06     75.9           78.2               10.2 +/-    0.37      10.4 +/-    0.37  0.180 / 0.100
G12     316.8          31.2               10.2 +/-    1.69      17.4 +/-    1.69  0.080 / 0.030
G17     50.2           39.4                9.9 +/-    0.89      14.5 +/-    0.89  0.070 / 0.040
G19     32.4           53.0               10.2 +/-    0.94      12.4 +/-    0.94  0.030 / 0.010
G24     272.6          42.3               10.4 +/-    2.81      14.6 +/-    2.81  0.030 / 0.020
G28     119.4          17.0               12.7 +/-    2.50      30.0 +/-    2.50  0.150 / 0.250