PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-17:57:50
G02     89.7           9.7                12.0 +/-    2.00      33.7 +/-    2.00  0.050 / 0.090
G05     45.7           26.9                7.1 +/-    1.74      13.3 +/-    1.74  0.060 / 0.080
G13     86.6           34.8               11.0 +/-    1.11      17.6 +/-    1.11  0.080 / 0.100
G15     136.7          45.7               12.3 +/-    0.62      16.4 +/-    0.62  0.080 / 0.120
G20     240.8          30.9               11.0 +/-    1.09      18.9 +/-    1.09  0.030 / 0.060
G21     304.6          40.2               10.3 +/-    1.01      15.0 +/-    1.01  0.030 / 0.060
G25     204.9          19.4               10.0 +/-    1.47      22.2 +/-    1.47  0.110 / 0.320
G26     297.0          19.9                8.5 +/-    1.35      18.7 +/-    1.35  0.110 / 0.310
G29     131.8          83.7               12.2 +/-    0.33      12.3 +/-    0.33  0.050 / 0.130