PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-19:27:50
G01     96.9           30.0               12.4 +/-    1.28      21.7 +/-    1.28  0.130 / 0.270
G07     119.5          51.0               13.1 +/-    0.53      16.3 +/-    0.53  0.160 / 0.450
G08     42.0           14.8                7.9 +/-    2.59      19.7 +/-    2.59  0.030 / 0.040
G11     77.2           42.3               11.7 +/-    0.99      16.4 +/-    0.99  0.030 / 0.050
G13     301.1          33.6               10.1 +/-    2.68      16.4 +/-    2.68  0.050 / 0.070
G17     211.5          44.0               16.2 +/-    0.99      22.2 +/-    0.99  0.030 / 0.070
G18     70.4           24.8               10.1 +/-    1.09      19.9 +/-    1.09  0.130 / 0.160
G19     212.4          20.6               17.2 +/-    2.12      37.2 +/-    2.12  0.110 / 0.110
G28     338.1          61.9               10.7 +/-    0.31      12.0 +/-    0.31  0.050 / 0.050
G30     82.6           78.3               13.4 +/-    0.43      13.6 +/-    0.43  0.050 / 0.050