PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-21:12:50
G02     201.8          30.0               16.5 +/-    0.83      28.9 +/-    0.83  0.240 / 0.300
G06     163.4          64.6               14.1 +/-    0.38      15.5 +/-    0.38  0.170 / 0.220
G12     305.1          12.4               10.7 +/-    3.46      28.2 +/-    3.46  0.070 / 0.110
G17     28.1           55.1               12.1 +/-    1.22      14.4 +/-    1.22  0.100 / 0.090
G19     345.0          68.3               11.5 +/-    0.51      12.3 +/-    0.51  0.030 / 0.030
G24     302.6          35.7               11.7 +/-    2.07      18.4 +/-    2.07  0.040 / 0.030
G28     97.8           34.2               13.5 +/-    0.61      21.8 +/-    0.61  0.030 / 0.030