PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/24-21:27:30
G02     204.3          38.8               17.3 +/-    1.12      25.7 +/-    1.12  0.120 / 0.150
G06     149.4          73.4               14.7 +/-    0.61      15.2 +/-    0.61  0.100 / 0.120
G12     309.9          19.0               12.2 +/-    1.70      27.6 +/-    1.70  0.090 / 0.090
G17     36.9           48.8               11.9 +/-    1.41      15.2 +/-    1.41  0.080 / 0.070
G19     5.2            63.8               12.3 +/-    0.52      13.6 +/-    0.52  0.030 / 0.020
G24     293.4          39.9                9.8 +/-    6.28      14.2 +/-    6.28  0.030 / 0.020
G28     106.1          28.5               14.1 +/-    0.81      25.5 +/-    0.81  0.030 / 0.040