PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-17:57:30
G05     45.7           26.9                7.7 +/-    1.44      14.5 +/-    1.44  0.090 / 0.110
G13     86.6           34.8               10.2 +/-    0.78      16.2 +/-    0.78  0.050 / 0.120
G15     136.7          45.7               12.5 +/-    1.21      16.7 +/-    1.21  0.070 / 0.120
G20     240.8          30.9               10.2 +/-    1.00      17.5 +/-    1.00  0.050 / 0.110
G21     304.6          40.2               10.4 +/-    1.04      15.1 +/-    1.04  0.060 / 0.110
G25     204.9          19.4                9.9 +/-    1.64      22.2 +/-    1.64  0.060 / 0.140
G26     297.0          19.9               10.3 +/-    1.14      22.8 +/-    1.14  0.030 / 0.060
G29     131.8          83.7               11.8 +/-    0.56      11.9 +/-    0.56  0.030 / 0.060