PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-06:42:40
G05     51.5           10.4                2.5 +/-    4.05       7.0 +/-    4.05  0.060 / 0.310
G10     240.3          16.8                7.3 +/-    1.14      17.3 +/-    1.14  0.070 / 0.390
G13     68.3           35.7                5.6 +/-    1.27       8.8 +/-    1.27  0.270 / 0.250
G15     111.9          55.5                6.3 +/-    0.57       7.4 +/-    0.57  0.330 / 0.310
G16     308.4          14.2                1.5 +/-    3.70       3.7 +/-    3.70  0.040 / 0.040
G20     314.7          75.4                4.7 +/-    0.81       4.9 +/-    0.81  0.040 / 0.040
G21     319.4          51.4                3.8 +/-    0.68       4.7 +/-    0.68  0.060 / 0.050
G26     279.9          19.8                3.9 +/-    1.39       8.5 +/-    1.39  0.050 / 0.060
G29     159.8          65.1                5.6 +/-    0.49       6.1 +/-    0.49  0.030 / 0.030