PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-02:12:40
G02     39.7           49.2                6.9 +/-    0.40       8.8 +/-    0.40  0.040 / 0.050
G05     120.9          67.0                9.5 +/-    0.60      10.3 +/-    0.60  0.030 / 0.040
G06     56.4           13.3                5.8 +/-    1.13      15.0 +/-    1.13  0.030 / 0.040
G12     196.6          62.6                9.9 +/-    0.79      11.0 +/-    0.79  0.040 / 0.040
G25     284.2          57.6                8.4 +/-    0.69       9.8 +/-    0.69  0.030 / 0.040
G29     314.3          36.9                8.4 +/-    1.28      12.8 +/-    1.28  0.030 / 0.040