PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-06:57:50
G10     248.1          24.3                6.6 +/-    0.95      13.2 +/-    0.95  0.090 / 0.230
G13     56.7           31.8                6.1 +/-    1.92      10.3 +/-    1.92  0.090 / 0.290
G15     90.9           57.3                6.8 +/-    1.29       8.0 +/-    1.29  0.040 / 0.040
G16     298.4          15.5                1.8 +/-    2.18       4.4 +/-    2.18  0.040 / 0.040
G20     349.1          72.3                5.8 +/-    0.49       6.1 +/-    0.49  0.030 / 0.040
G21     330.5          58.4                4.8 +/-    0.74       5.6 +/-    0.74  0.030 / 0.040
G26     269.5          16.8                6.0 +/-    1.83      14.2 +/-    1.83  0.050 / 0.010
G29     164.0          53.2                6.3 +/-    0.58       7.6 +/-    0.58  0.040 / 0.020