PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/29-05:57:50
G10     247.2          23.5                6.9 +/-    1.88      14.0 +/-    1.88  0.110 / 0.250
G13     57.8           32.3                6.5 +/-    2.16      10.9 +/-    2.16  0.100 / 0.260
G15     94.0           57.5                8.1 +/-    0.44       9.4 +/-    0.44  0.040 / 0.040
G16     299.3          15.5                3.2 +/-    1.29       7.8 +/-    1.29  0.040 / 0.040
G20     315.3          72.4                5.7 +/-    0.41       6.0 +/-    0.41  0.030 / 0.050
G21     328.7          57.3                5.0 +/-    0.56       5.8 +/-    0.56  0.040 / 0.050
G26     270.5          17.2                6.7 +/-    1.79      15.7 +/-    1.79  0.030 / 0.040
G29     163.8          54.9                8.1 +/-    0.39       9.6 +/-    0.39  0.030 / 0.040