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               15.3 +/-    1.89      32.0 +/-    1.89  0.080 / 0.150
G07     95.8           62.9               14.5 +/-    0.48      16.0 +/-    0.48  0.110 / 0.150
G08     43.3           27.7               10.4 +/-    1.66      19.1 +/-    1.66  0.030 / 0.040
G09     176.0          19.3               16.6 +/-    1.10      37.1 +/-    1.10  0.030 / 0.040
G11     98.7           42.2               13.8 +/-    0.72      19.4 +/-    0.72  0.030 / 0.030
G13     314.0          24.5               12.7 +/-    1.05      25.2 +/-    1.05  0.030 / 0.030
G17     204.6          28.7               16.9 +/-    2.63      30.4 +/-    2.63  0.110 / 0.180
G18     87.3           23.1               13.7 +/-    1.20      28.0 +/-    1.20  0.100 / 0.170
G28     306.3          59.7               13.4 +/-    0.92      15.3 +/-    0.92  0.040 / 0.050
G30     5.0            74.6               14.3 +/-    0.73      14.8 +/-    0.73  0.040 / 0.050