PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-06:13:00
G10     260.4          35.1                8.5 +/-    1.47      13.4 +/-    1.47  0.050 / 0.030
G13     45.1           22.4                4.9 +/-    2.80      10.2 +/-    2.80  0.040 / 0.030
G15     66.0           52.1                5.7 +/-    1.45       7.0 +/-    1.45  0.090 / 0.090
G16     289.3          13.3                4.3 +/-    1.89      11.1 +/-    1.89  0.090 / 0.120
G20     286.4          57.3                5.5 +/-    1.93       6.3 +/-    1.93  0.250 / 0.360
G21     354.2          68.5                5.4 +/-    0.64       5.7 +/-    0.64  0.190 / 0.220
G24     124.8          10.6               -0.0 +/-   22.49      -0.0 +/-   22.49  0.130 / 0.430
G26     261.4          10.9                6.9 +/-    3.06      19.0 +/-    3.06  0.180 / 0.330
G27     321.7          12.2                3.6 +/-    2.93       9.5 +/-    2.93  0.100 / 0.210
G29     164.2          34.1                7.1 +/-    1.17      11.5 +/-    1.17  0.120 / 0.250