PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-21:43:00
G02     200.1          21.7               24.6 +/-    2.50      52.0 +/-    2.50  0.110 / 0.200
G06     169.8          54.9               18.2 +/-    1.15      21.7 +/-    1.15  0.150 / 0.250
G13     227.2          12.8               23.5 +/-    2.51      61.4 +/-    2.51  0.110 / 0.110
G17     16.9           62.1               13.9 +/-    0.79      15.5 +/-    0.79  0.140 / 0.100
G19     319.4          70.7               14.2 +/-    0.49      15.0 +/-    0.49  0.060 / 0.040
G24     309.7          30.0               14.5 +/-    1.43      25.5 +/-    1.43  0.040 / 0.040
G28     88.6           39.3               14.1 +/-    1.26      20.7 +/-    1.26  0.050 / 0.100
G30     156.9          13.5               20.6 +/-    2.06      53.3 +/-    2.06  0.070 / 0.080