PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-14:57:30
G02     202.0          22.0               10.3 +/-    3.20      21.6 +/-    3.20  0.180 / 0.240
G06     165.0          60.1                9.6 +/-    0.78      10.9 +/-    0.78  0.160 / 0.230
G12     303.3          12.3                6.7 +/-    2.53      17.7 +/-    2.53  0.090 / 0.110
G17     28.2           55.4                8.8 +/-    0.76      10.4 +/-    0.76  0.100 / 0.100
G19     323.7          69.9                7.6 +/-    0.43       8.0 +/-    0.43  0.350 / 0.270
G24     306.0          33.8                6.5 +/-    3.06      10.5 +/-    3.06  0.160 / 0.210
G28     92.2           37.6               10.1 +/-    0.91      15.4 +/-    0.91  0.050 / 0.040
G30     158.1          12.4                9.8 +/-    1.43      25.9 +/-    1.43  0.040 / 0.030