PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-05:58:00
G10     280.6          45.1                8.9 +/-    0.94      11.9 +/-    0.94  0.060 / 0.110
G15     50.0           39.1                5.3 +/-    0.87       7.8 +/-    0.87  0.070 / 0.110
G20     15.8           63.8                5.0 +/-    0.67       5.5 +/-    0.67  0.050 / 0.050
G21     42.2           77.1                7.6 +/-    0.60       7.8 +/-    0.60  0.040 / 0.050
G24     109.7          20.8                7.2 +/-    0.75      15.5 +/-    0.75  0.040 / 0.030
G27     311.4          27.7                7.5 +/-    1.33      13.7 +/-    1.33  0.040 / 0.050
G29     168.9          19.6                6.8 +/-    1.31      15.0 +/-    1.31  0.080 / 0.140
G32     206.2          21.7                8.1 +/-    0.54      17.0 +/-    0.54  0.090 / 0.140