PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-01:58:00
G02     47.7           42.2                6.9 +/-    0.92       9.8 +/-    0.92  0.030 / 0.040
G05     91.0           68.7                7.8 +/-    0.78       8.3 +/-    0.78  0.030 / 0.040
G12     190.7          51.7                9.9 +/-    0.94      12.2 +/-    0.94  0.040 / 0.040
G25     264.1          58.7                7.0 +/-    2.46       8.1 +/-    2.46  0.040 / 0.050
G29     321.1          44.5                7.4 +/-    0.62      10.1 +/-    0.62  0.030 / 0.020