PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-04:12:30
G08     294.6          23.3                7.8 +/-    2.46      15.8 +/-    2.46  0.050 / 0.030
G10     358.4          62.8                5.0 +/-    0.91       5.6 +/-    0.91  0.050 / 0.040
G14     227.8          45.6                9.2 +/-    2.04      12.3 +/-    2.04  0.090 / 0.200
G18     57.2           54.2                5.8 +/-    1.53       7.0 +/-    1.53  0.080 / 0.180
G21     144.4          43.5                9.3 +/-    1.97      12.7 +/-    1.97  0.040 / 0.070
G24     60.1           27.8                5.7 +/-    1.20      10.5 +/-    1.20  0.050 / 0.090
G27     255.8          32.9                8.8 +/-    1.56      14.6 +/-    1.56  0.040 / 0.040
G32     240.6          64.7                8.0 +/-    1.28       8.8 +/-    1.28  0.040 / 0.040