PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-02:57:50
G08     309.4          19.4                8.0 +/-    2.14      17.9 +/-    2.14  0.070 / 0.110
G10     327.2          59.1                7.7 +/-    1.47       8.8 +/-    1.47  0.280 / 0.230
G14     217.4          31.2               10.7 +/-    2.46      18.3 +/-    2.46  0.070 / 0.220
G15     46.4           14.3                4.6 +/-    1.38      11.7 +/-    1.38  0.060 / 0.170
G18     33.2           60.9                7.8 +/-    0.86       8.8 +/-    0.86  0.030 / 0.050
G21     132.2          58.6               10.0 +/-    0.54      11.5 +/-    0.54  0.030 / 0.040
G24     77.3           30.6                8.6 +/-    0.79      14.9 +/-    0.79  0.040 / 0.040
G27     274.8          37.8                9.9 +/-    1.22      14.9 +/-    1.22  0.030 / 0.040
G32     222.3          49.9                9.7 +/-    1.73      12.3 +/-    1.73  0.050 / 0.080