PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-19:57:40
G02     358.8          74.6                9.6 +/-    0.41       9.9 +/-    0.41  0.040 / 0.080
G05     160.9          40.4               13.0 +/-    1.24      18.8 +/-    1.24  0.040 / 0.060
G06     44.1           32.3                7.4 +/-    0.68      12.4 +/-    0.68  0.030 / 0.040
G12     282.7          80.4                8.8 +/-    0.65       8.9 +/-    0.65  0.040 / 0.040
G19     79.8           25.6               10.6 +/-    0.76      20.5 +/-    0.76  0.180 / 0.490
G24     222.1          17.5               10.7 +/-    5.46      25.0 +/-    5.46  0.150 / 0.370
G25     315.5          35.5               10.6 +/-    2.86      16.7 +/-    2.86  0.040 / 0.040
G29     290.6          11.8               12.2 +/-    1.92      32.8 +/-    1.92  0.040 / 0.040