PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-02:12:20
G02     39.7           49.2                6.2 +/-    1.20       7.9 +/-    1.20  0.030 / 0.040
G05     120.9          67.0                9.3 +/-    0.50      10.0 +/-    0.50  0.030 / 0.050
G06     56.4           13.3                5.4 +/-    1.68      14.0 +/-    1.68  0.030 / 0.030
G12     196.6          62.6                9.9 +/-    0.73      11.0 +/-    0.73  0.030 / 0.030
G25     284.2          57.6               12.5 +/-    4.05      14.5 +/-    4.05  0.030 / 0.030
G29     314.3          36.9                8.3 +/-    0.92      12.7 +/-    0.92  0.020 / 0.020