PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-21:57:40
G02     200.0          21.2               15.5 +/-    1.82      33.0 +/-    1.82  0.080 / 0.140
G06     170.2          54.2               12.7 +/-    1.30      15.3 +/-    1.30  0.090 / 0.170
G13     227.6          13.3               18.3 +/-    4.77      47.4 +/-    4.77  0.040 / 0.080
G17     15.7           62.8               10.9 +/-    0.76      12.1 +/-    0.76  0.040 / 0.100
G19     317.6          70.8               10.4 +/-    0.43      10.9 +/-    0.43  0.130 / 0.150
G24     310.2          29.5                9.2 +/-    1.97      16.2 +/-    1.97  0.080 / 0.130
G28     87.9           39.6               11.3 +/-    1.09      16.6 +/-    1.09  0.050 / 0.060
G30     156.8          13.9               15.2 +/-    1.05      38.8 +/-    1.05  0.060 / 0.050