PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-07:57:30
G08     291.3          21.9                8.9 +/-    2.04      18.8 +/-    2.04  0.070 / 0.110
G10     17.3           63.1                4.5 +/-    0.66       5.0 +/-    0.66  0.090 / 0.100
G14     233.4          45.6                9.5 +/-    1.61      12.7 +/-    1.61  0.090 / 0.100
G18     317.7          12.9                3.3 +/-    2.37       8.7 +/-    2.37  0.100 / 0.110
G20     85.5           31.7                4.6 +/-    0.88       7.9 +/-    0.88  0.040 / 0.080
G21     148.7          36.1                5.8 +/-    0.49       9.0 +/-    0.49  0.040 / 0.090
G24     51.9           23.2                4.0 +/-    3.59       8.1 +/-    3.59  0.090 / 0.280
G27     249.2          29.1                7.8 +/-    2.00      14.0 +/-    2.00  0.090 / 0.290
G31     181.5          12.0                4.0 +/-   11.42      10.8 +/-   11.42  0.150 / 0.170
G32     260.0          73.0                6.0 +/-    0.60       6.2 +/-    0.60  0.120 / 0.170