PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-02:57:40
G08     320.1          11.6                2.3 +/-   12.67       6.2 +/-   12.67  0.050 / 0.050
G10     302.4          53.0                8.2 +/-    0.87      10.0 +/-    0.87  0.060 / 0.040
G14     211.2          17.3                9.6 +/-    1.80      22.4 +/-    1.80  0.090 / 0.070
G15     45.9           27.4                7.0 +/-    2.21      13.0 +/-    2.21  0.070 / 0.070
G18     3.0            65.6                6.0 +/-   23.11       6.5 +/-   23.11  0.040 / 0.050
G20     74.9           14.0                5.4 +/-    1.48      13.7 +/-    1.48  0.040 / 0.050
G21     107.5          71.6               11.1 +/-    1.55      11.6 +/-    1.55  0.080 / 0.100
G24     94.5           28.0                9.1 +/-    1.54      16.7 +/-    1.54  0.090 / 0.100
G27     293.9          36.6               10.6 +/-    1.61      16.4 +/-    1.61  0.090 / 0.280
G32     212.8          35.5               12.6 +/-    1.98      19.8 +/-    1.98  0.200 / 0.340