PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-16:27:50
G01     43.8           19.8                8.8 +/-    3.10      19.5 +/-    3.10  0.060 / 0.090
G06     174.4          35.6               10.2 +/-    1.04      16.0 +/-    1.04  0.060 / 0.090
G13     241.6          25.1               10.3 +/-    1.22      20.1 +/-    1.22  0.230 / 0.230
G15     277.8          13.3                8.4 +/-    1.14      21.8 +/-    1.14  0.230 / 0.350
G17     349.8          74.0               10.8 +/-    0.37      11.2 +/-    0.37  0.120 / 0.220
G19     260.6          63.7               11.5 +/-    0.83      12.7 +/-    0.83  0.080 / 0.290
G24     317.5          16.5                9.4 +/-    2.43      22.7 +/-    2.43  0.080 / 0.090
G28     65.1           49.2               11.4 +/-    0.63      14.6 +/-    0.63  0.070 / 0.080
G30     153.5          33.1               10.8 +/-    0.90      17.8 +/-    0.90  0.100 / 0.370