PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-06:58:00
G10     265.1          36.9                7.1 +/-    1.11      10.9 +/-    1.11  0.150 / 0.350
G13     42.9           19.9                3.8 +/-    1.73       8.5 +/-    1.73  0.230 / 0.430
G15     60.6           49.5                5.8 +/-    0.55       7.4 +/-    0.55  0.110 / 0.150
G16     280.2          12.6                5.1 +/-    1.75      13.4 +/-    1.75  0.110 / 0.180
G20     16.9           64.4                5.3 +/-    0.55       5.8 +/-    0.55  0.070 / 0.080
G21     358.9          70.8                6.1 +/-    0.70       6.5 +/-    0.70  0.080 / 0.080
G24     121.8          13.2                6.0 +/-    1.55      15.5 +/-    1.55  0.110 / 0.310
G27     319.1          18.0                4.1 +/-    1.28       9.5 +/-    1.28  0.110 / 0.320
G29     167.9          33.1                9.2 +/-    0.60      15.2 +/-    0.60  0.040 / 0.050