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                6.8 +/-    2.99      15.1 +/-    2.99  0.030 / 0.020
G10     54.1           60.2                4.5 +/-    0.49       5.1 +/-    0.49  0.030 / 0.020
G11     311.7          17.6                5.1 +/-    2.46      11.9 +/-    2.46  0.110 / 0.310
G14     263.4          66.1                5.9 +/-    1.17       6.3 +/-    1.17  0.110 / 0.110
G18     88.0           39.6                5.8 +/-    1.03       8.4 +/-    1.03  0.080 / 0.210
G21     153.7          18.1                6.8 +/-    3.36      15.7 +/-    3.36  0.080 / 0.190
G24     41.5           13.5                4.7 +/-    3.54      12.2 +/-    3.54  0.020 / 0.030
G27     232.5          17.3                7.9 +/-    2.14      18.6 +/-    2.14  0.030 / 0.030
G31     178.9          27.4                8.6 +/-    1.65      15.8 +/-    1.65  0.130 / 0.310
G32     324.2          75.2                5.4 +/-    0.62       5.6 +/-    0.62  0.080 / 0.230