PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-15:57:50
G02     208.6          43.9               10.3 +/-    0.68      14.1 +/-    0.68  0.090 / 0.100
G06     110.0          78.4               10.0 +/-    0.49      10.2 +/-    0.49  0.110 / 0.080
G12     314.9          29.0                8.9 +/-    1.31      15.8 +/-    1.31  0.050 / 0.100
G17     47.4           39.7                7.6 +/-    1.41      11.1 +/-    1.41  0.050 / 0.110
G19     15.9           60.1                9.2 +/-    1.08      10.4 +/-    1.08  0.040 / 0.030
G24     281.4          42.8                8.7 +/-    2.03      12.2 +/-    2.03  0.040 / 0.020
G28     112.8          23.4                8.8 +/-    1.44      17.8 +/-    1.44  0.040 / 0.030