PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-17:57:40
G02     215.5          56.9               11.3 +/-    0.75      13.2 +/-    0.75  0.050 / 0.090
G06     58.7           73.6               10.3 +/-    0.75      10.7 +/-    0.75  0.070 / 0.080
G12     319.3          38.5                8.7 +/-    0.91      12.9 +/-    0.91  0.050 / 0.080
G17     56.6           32.9                8.4 +/-    0.44      13.9 +/-    0.44  0.050 / 0.060
G19     34.1           52.3                9.0 +/-    0.32      11.1 +/-    0.32  0.090 / 0.250
G24     265.3          42.1               10.0 +/-    1.26      14.1 +/-    1.26  0.130 / 0.260
G28     121.7          14.7               10.4 +/-    1.14      26.1 +/-    1.14  0.080 / 0.090