PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-21:42:20
G02     200.7          25.3               15.4 +/-    2.76      29.8 +/-    2.76  0.200 / 0.560
G06     167.7          59.1               14.4 +/-    0.49      16.5 +/-    0.49  0.150 / 0.430
G17     21.8           59.3               12.5 +/-    0.60      14.2 +/-    0.60  0.100 / 0.150
G19     331.3          70.0               11.7 +/-    0.75      12.4 +/-    0.75  0.090 / 0.150
G24     307.0          32.5               10.7 +/-    2.07      17.8 +/-    2.07  0.040 / 0.040
G28     92.7           37.1               13.3 +/-    0.90      20.3 +/-    0.90  0.040 / 0.030
G30     157.3          10.1               12.7 +/-    8.32      35.4 +/-    8.32  0.060 / 0.080