PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-20:28:00
G02     304.7          81.1               11.1 +/-    0.60      11.2 +/-    0.60  0.110 / 0.120
G05     166.5          27.4               16.3 +/-    0.91      30.1 +/-    0.91  0.100 / 0.130
G06     39.8           47.0                9.8 +/-    0.58      12.9 +/-    0.58  0.070 / 0.090
G12     318.5          62.1               10.2 +/-    1.71      11.4 +/-    1.71  0.080 / 0.060
G17     79.6           16.4               10.1 +/-    1.35      24.3 +/-    1.35  0.040 / 0.040
G19     69.1           30.1               10.5 +/-    0.96      18.4 +/-    0.96  0.040 / 0.040
G24     233.7          27.1               14.8 +/-    0.92      27.7 +/-    0.92  0.050 / 0.020
G25     317.5          22.3                7.9 +/-    1.40      16.5 +/-    1.40  0.050 / 0.020