PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/26-09:57:50
G01     117.5          19.0                5.7 +/-    1.86      12.8 +/-    1.86  0.030 / 0.040
G07     87.3           63.8                4.7 +/-    0.43       5.1 +/-    0.43  0.030 / 0.040
G08     44.0           28.4                1.5 +/-    0.74       2.6 +/-    0.74  0.030 / 0.030
G09     175.6          23.0                6.1 +/-    0.93      12.5 +/-    0.93  0.030 / 0.030
G11     102.7          39.3                5.6 +/-    0.53       8.3 +/-    0.53  0.050 / 0.070
G13     317.9          18.9                3.1 +/-    1.08       6.9 +/-    1.08  0.070 / 0.090
G17     201.4          28.5                6.1 +/-    1.38      11.1 +/-    1.38  0.140 / 0.160
G28     296.7          58.1                3.1 +/-    0.86       3.5 +/-    0.86  0.120 / 0.120
G30     347.6          68.9                3.4 +/-    0.34       3.6 +/-    0.34  0.080 / 0.080