PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-21:42:50
G02     209.9          51.5               15.8 +/-    0.61      19.6 +/-    0.61  0.120 / 0.120
G06     91.1           78.9               13.8 +/-    0.30      14.1 +/-    0.30  0.080 / 0.090
G12     315.7          29.3               10.8 +/-    1.14      19.2 +/-    1.14  0.060 / 0.070
G17     48.3           40.1               11.1 +/-    1.96      16.2 +/-    1.96  0.070 / 0.070
G19     25.9           56.1               12.1 +/-    1.32      14.3 +/-    1.32  0.030 / 0.020
G24     277.0          42.6               10.4 +/-    0.94      14.6 +/-    0.94  0.030 / 0.020
G28     116.5          19.9               12.0 +/-    2.38      26.5 +/-    2.38  0.050 / 0.040