PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/20-00:12:30
G02     208.1          50.0               12.7 +/-    0.93      16.0 +/-    0.93  0.070 / 0.140
G06     111.3          79.4               10.9 +/-    0.39      11.1 +/-    0.39  0.050 / 0.120
G12     314.3          26.0               10.0 +/-    2.85      19.2 +/-    2.85  0.100 / 0.210
G17     44.3           43.7                9.0 +/-    0.92      12.3 +/-    0.92  0.080 / 0.220
G19     23.7           57.1               11.2 +/-    0.66      13.1 +/-    0.66  0.050 / 0.080
G24     281.1          42.2               10.9 +/-    0.83      15.3 +/-    0.83  0.060 / 0.090
G28     114.7          21.5               13.1 +/-    1.72      27.9 +/-    1.72  0.060 / 0.070