PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-23:12:30
G02     220.1          65.4               13.1 +/-    0.78      14.2 +/-    0.78  0.050 / 0.080
G06     49.1           69.8               11.6 +/-    0.49      12.3 +/-    0.49  0.030 / 0.070
G12     320.0          40.5               10.9 +/-    1.87      15.7 +/-    1.87  0.070 / 0.090
G17     59.1           32.5               11.2 +/-    1.61      18.7 +/-    1.61  0.070 / 0.090
G19     43.0           47.4               11.1 +/-    0.67      14.4 +/-    0.67  0.350 / 0.390
G24     259.4          40.4               14.4 +/-    4.37      20.7 +/-    4.37  0.210 / 0.360
G28     125.6          10.1               15.4 +/-    3.45      42.8 +/-    3.45  0.030 / 0.030