PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-01:57:20
G02     30.6           57.2                7.7 +/-    0.62       9.0 +/-    0.62  0.030 / 0.040
G05     142.3          59.5                9.7 +/-    0.97      11.0 +/-    0.97  0.030 / 0.030
G06     50.7           21.1                5.2 +/-    0.91      11.1 +/-    0.91  0.040 / 0.060
G12     212.8          73.4                9.7 +/-    0.73      10.1 +/-    0.73  0.040 / 0.070
G19     97.0           11.4                8.0 +/-    1.69      21.7 +/-    1.69  0.030 / 0.040
G25     300.9          51.9                7.2 +/-    0.99       8.9 +/-    0.99  0.030 / 0.040
G29     306.8          29.3                6.2 +/-    1.40      11.1 +/-    1.40  0.070 / 0.150