PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-02:28:00
G08     290.1          23.6                6.0 +/-    1.37      12.0 +/-    1.37  0.040 / 0.030
G10     8.2            63.2                7.0 +/-    1.06       7.8 +/-    1.06  0.030 / 0.020
G14     231.8          49.5                9.5 +/-    2.29      12.1 +/-    2.29  0.120 / 0.200
G18     64.0           51.3                7.7 +/-    0.76       9.6 +/-    0.76  0.180 / 0.110
G21     146.7          38.5               10.0 +/-    0.51      14.8 +/-    0.51  0.020 / 0.020
G24     56.0           26.1                6.7 +/-    2.32      12.8 +/-    2.32  0.030 / 0.020
G27     251.1          30.6                9.0 +/-    2.19      15.6 +/-    2.19  0.040 / 0.080
G32     247.9          67.3                6.5 +/-    0.40       7.0 +/-    0.40  0.040 / 0.070