PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-13:42:40
G01     117.9          18.8                9.6 +/-    1.29      21.8 +/-    1.29  0.030 / 0.030
G07     84.1           65.9                9.2 +/-    0.34       9.9 +/-    0.34  0.030 / 0.030
G08     44.2           29.7                7.4 +/-    1.24      13.0 +/-    1.24  0.030 / 0.030
G09     175.6          23.1                9.6 +/-    0.88      19.6 +/-    0.88  0.020 / 0.030
G11     104.1          40.5                9.5 +/-    0.93      13.7 +/-    0.93  0.150 / 0.330
G13     316.9          20.7                6.4 +/-    1.51      13.9 +/-    1.51  0.220 / 0.390
G17     202.0          26.0                8.2 +/-    2.09      15.6 +/-    2.09  0.130 / 0.170
G18     92.5           21.3                8.3 +/-    1.65      17.7 +/-    1.65  0.140 / 0.150
G28     295.1          57.8                6.6 +/-    1.12       7.6 +/-    1.12  0.160 / 0.200
G30     347.2          69.2                7.8 +/-    0.30       8.3 +/-    0.30  0.110 / 0.190