PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-21:13:00
G02     200.1          20.9               17.3 +/-    2.63      37.2 +/-    2.63  0.030 / 0.030
G06     169.9          54.4               15.9 +/-    0.90      19.1 +/-    0.90  0.030 / 0.030
G13     227.6          13.2               16.6 +/-    2.88      43.1 +/-    2.88  0.200 / 0.300
G17     16.7           62.3               12.4 +/-    0.62      13.8 +/-    0.62  0.150 / 0.220
G19     316.8          70.8               12.0 +/-    0.39      12.6 +/-    0.39  0.050 / 0.040
G24     310.1          29.6               11.7 +/-    1.30      20.7 +/-    1.30  0.040 / 0.040
G28     87.9           39.7               13.2 +/-    0.91      19.2 +/-    0.91  0.050 / 0.080
G30     156.9          14.2               17.4 +/-    1.41      44.0 +/-    1.41  0.050 / 0.080