PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-04:27:40
G08     268.2          19.3                6.5 +/-    1.54      14.6 +/-    1.54  0.080 / 0.120
G10     54.1           60.2                3.2 +/-    0.69       3.7 +/-    0.69  0.090 / 0.140
G11     311.7          17.6                4.8 +/-    3.74      11.1 +/-    3.74  0.070 / 0.060
G14     263.4          66.1                6.0 +/-    0.88       6.5 +/-    0.88  0.060 / 0.050
G18     88.0           39.6                5.8 +/-    0.64       8.4 +/-    0.64  0.100 / 0.370
G21     153.7          18.1                5.6 +/-    4.09      12.9 +/-    4.09  0.080 / 0.310
G24     41.5           13.5                3.8 +/-    1.54       9.9 +/-    1.54  0.020 / 0.030
G27     232.5          17.3                8.8 +/-    2.48      20.6 +/-    2.48  0.030 / 0.030
G31     178.9          27.4                6.9 +/-    1.89      12.8 +/-    1.89  0.090 / 0.330
G32     324.2          75.2                5.9 +/-    0.67       6.1 +/-    0.67  0.130 / 0.250