PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-08:42:50
G01     112.7          20.9                5.7 +/-    1.71      12.3 +/-    1.71  0.050 / 0.030
G07     95.0           61.9                6.5 +/-    0.71       7.2 +/-    0.71  0.030 / 0.030
G08     43.7           29.2                3.1 +/-    0.63       5.6 +/-    0.63  0.030 / 0.040
G09     175.4          20.3                6.9 +/-    1.01      15.1 +/-    1.01  0.030 / 0.040
G11     101.3          43.1                6.3 +/-    0.91       8.7 +/-    0.91  0.080 / 0.140
G13     314.3          24.8                3.8 +/-    1.48       7.4 +/-    1.48  0.080 / 0.100
G17     202.9          27.8                5.4 +/-    1.20      10.0 +/-    1.20  0.090 / 0.190
G18     87.8           22.6                3.5 +/-    1.22       7.3 +/-    1.22  0.100 / 0.200
G28     291.2          54.9                6.0 +/-    1.42       7.2 +/-    1.42  0.090 / 0.150
G30     352.3          72.2                5.4 +/-    0.72       5.7 +/-    0.72  0.090 / 0.220