PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/23-07:27:30
G10     246.1          23.9                6.2 +/-    1.18      12.5 +/-    1.18  0.040 / 0.040
G13     58.4           31.9                4.8 +/-    1.29       8.2 +/-    1.29  0.040 / 0.040
G15     95.5           57.4                6.3 +/-    0.48       7.4 +/-    0.48  0.090 / 0.340
G16     306.1          13.2                1.9 +/-    1.66       5.0 +/-    1.66  0.110 / 0.290
G20     263.4          47.5                5.5 +/-    3.56       7.1 +/-    3.56  0.080 / 0.130
G21     332.0          58.7                4.5 +/-    0.35       5.1 +/-    0.35  0.060 / 0.110
G26     277.3          16.7                6.4 +/-    2.01      15.2 +/-    2.01  0.090 / 0.100
G29     158.8          50.0                7.3 +/-    0.76       9.2 +/-    0.76  0.120 / 0.130