PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-09:57:30
G01     119.3          17.7                6.3 +/-    1.71      14.6 +/-    1.71  0.030 / 0.030
G07     81.2           66.2                6.2 +/-    0.37       6.7 +/-    0.37  0.030 / 0.030
G08     44.5           30.0                3.7 +/-    1.39       6.5 +/-    1.39  0.140 / 0.180
G09     174.0          22.3                6.9 +/-    1.05      14.3 +/-    1.05  0.140 / 0.170
G11     105.5          40.0                7.5 +/-    1.20      10.9 +/-    1.20  0.100 / 0.240
G13     317.6          19.6                2.9 +/-    1.17       6.4 +/-    1.17  0.190 / 0.340
G17     201.0          25.6                6.0 +/-    1.89      11.6 +/-    1.89  0.030 / 0.030
G18     93.2           20.7                4.8 +/-    2.09      10.5 +/-    2.09  0.030 / 0.030
G28     290.9          56.8                5.7 +/-    1.45       6.6 +/-    1.45  0.120 / 0.210
G30     343.0          67.4                5.5 +/-    0.93       5.9 +/-    0.93  0.120 / 0.220