PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/15-14:27:30
G02     284.0          80.1                5.0 +/-    0.85       5.1 +/-    0.85  0.120 / 0.310
G05     169.4          24.0                7.7 +/-    1.65      15.5 +/-    1.65  0.130 / 0.350
G06     39.9           47.0                4.0 +/-    0.66       5.2 +/-    0.66  0.080 / 0.150
G12     319.5          63.2                4.5 +/-    1.64       5.0 +/-    1.64  0.080 / 0.180
G17     77.9           17.9                4.8 +/-    0.43      11.0 +/-    0.43  0.060 / 0.150
G19     67.8           30.4                5.9 +/-    1.67      10.3 +/-    1.67  0.100 / 0.180
G24     236.6          28.4                5.3 +/-    0.96       9.5 +/-    0.96  0.030 / 0.040
G25     317.4          20.2                4.4 +/-    2.39       9.6 +/-    2.39  0.020 / 0.040