PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-20:58:00
G01     88.1           32.3               15.5 +/-    0.89      25.8 +/-    0.89  0.070 / 0.100
G07     127.1          44.4               16.8 +/-    0.75      22.8 +/-    0.75  0.080 / 0.110
G11     68.3           40.1               14.3 +/-    0.86      20.7 +/-    0.86  0.070 / 0.120
G13     292.8          36.3               13.6 +/-    0.77      21.1 +/-    0.77  0.080 / 0.110
G15     314.1          10.9               -4.0 +/-   23.68     -10.9 +/-   23.68  0.040 / 0.060
G17     216.7          50.2               16.4 +/-    1.09      20.6 +/-    1.09  0.040 / 0.050
G18     62.5           23.7               12.7 +/-    0.84      25.5 +/-    0.84  0.030 / 0.060
G19     215.6          27.9               17.4 +/-    1.21      31.9 +/-    1.21  0.040 / 0.060
G28     353.5          61.6               13.9 +/-    1.28      15.5 +/-    1.28  0.050 / 0.090
G30     112.0          72.9               16.0 +/-    0.33      16.6 +/-    0.33  0.050 / 0.090