PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-18:12:50
G01     112.9          22.2               15.8 +/-    1.12      32.9 +/-    1.12  0.070 / 0.100
G07     95.8           62.9               13.9 +/-    0.39      15.4 +/-    0.39  0.080 / 0.120
G08     43.3           27.7               10.9 +/-    1.35      20.0 +/-    1.35  0.030 / 0.030
G09     176.0          19.3               14.9 +/-    1.09      33.5 +/-    1.09  0.030 / 0.040
G11     98.7           42.2               14.6 +/-    0.60      20.5 +/-    0.60  0.070 / 0.060
G13     314.0          24.5               13.3 +/-    1.75      26.3 +/-    1.75  0.060 / 0.050
G17     204.6          28.7               16.1 +/-    1.43      29.0 +/-    1.43  0.030 / 0.040
G18     87.3           23.1               13.0 +/-    0.74      26.5 +/-    0.74  0.030 / 0.030
G28     306.3          59.7               13.6 +/-    0.95      15.5 +/-    0.95  0.050 / 0.090
G30     5.0            74.6               14.5 +/-    0.45      14.9 +/-    0.45  0.040 / 0.080