PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-22:28:10
G02     213.7          58.0               18.4 +/-    1.10      21.2 +/-    1.10  0.080 / 0.110
G06     64.3           75.8               16.0 +/-    0.39      16.4 +/-    0.39  0.070 / 0.090
G12     317.9          34.3               12.7 +/-    1.29      20.4 +/-    1.29  0.130 / 0.350
G17     53.3           36.5               13.2 +/-    1.32      20.4 +/-    1.32  0.140 / 0.310
G19     34.3           52.1               15.3 +/-    1.31      18.8 +/-    1.31  0.030 / 0.020
G24     268.7          42.1               18.4 +/-    2.81      25.8 +/-    2.81  0.020 / 0.020
G28     120.9          15.4               19.1 +/-    2.32      47.1 +/-    2.32  0.050 / 0.040