PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-05:57:40
G10     244.3          20.9                7.4 +/-    0.72      15.9 +/-    0.72  0.170 / 0.640
G13     61.7           33.9                5.7 +/-    0.56       9.2 +/-    0.56  0.120 / 0.570
G15     101.5          57.2                8.4 +/-    0.95       9.8 +/-    0.95  0.040 / 0.060
G16     302.9          15.3                2.7 +/-    2.59       6.6 +/-    2.59  0.040 / 0.050
G20     306.2          72.6                7.0 +/-    0.75       7.3 +/-    0.75  0.070 / 0.050
G21     324.8          54.8                5.7 +/-    0.69       6.9 +/-    0.69  0.100 / 0.050
G26     274.2          18.4                4.8 +/-    1.14      10.9 +/-    1.14  0.050 / 0.020
G29     162.5          59.1                8.8 +/-    0.89      10.0 +/-    0.89  0.040 / 0.010