PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-02:28:00
G10     265.3          37.1               10.3 +/-    1.94      15.8 +/-    1.94  0.040 / 0.050
G13     42.7           19.5                6.1 +/-    0.86      13.6 +/-    0.86  0.040 / 0.050
G15     62.3           51.4                8.2 +/-    0.64      10.2 +/-    0.64  0.110 / 0.130
G16     279.3          12.7                8.7 +/-    1.30      22.7 +/-    1.30  0.110 / 0.150
G20     287.7          55.7                8.8 +/-    0.97      10.4 +/-    0.97  0.070 / 0.280
G21     356.8          70.4                8.7 +/-    0.73       9.2 +/-    0.73  0.070 / 0.240
G24     120.8          13.3                8.7 +/-    1.96      22.4 +/-    1.96  0.150 / 0.330
G27     319.3          17.6                6.6 +/-    0.72      15.4 +/-    0.72  0.110 / 0.320
G29     168.2          33.8                9.8 +/-    2.21      15.9 +/-    2.21  0.160 / 0.370