PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/15-14:27:40
G02     284.0          80.1                5.2 +/-    0.88       5.3 +/-    0.88  0.110 / 0.130
G05     169.4          24.0                4.7 +/-    2.86       9.4 +/-    2.86  0.090 / 0.120
G06     39.9           47.0                4.3 +/-    1.35       5.7 +/-    1.35  0.120 / 0.180
G12     319.5          63.2                5.3 +/-    0.96       5.9 +/-    0.96  0.090 / 0.150
G17     77.9           17.9                5.4 +/-    1.21      12.6 +/-    1.21  0.050 / 0.080
G19     67.8           30.4                5.9 +/-    1.36      10.3 +/-    1.36  0.060 / 0.110
G24     236.6          28.4                7.2 +/-    1.20      13.1 +/-    1.20  0.040 / 0.050
G25     317.4          20.2                2.2 +/-    3.08       4.8 +/-    3.08  0.040 / 0.060