PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-20:27:50
G10     282.1          47.0               11.5 +/-    1.88      15.0 +/-    1.88  0.070 / 0.130
G15     49.9           39.0                8.7 +/-    1.08      12.9 +/-    1.08  0.070 / 0.120
G20     326.3          64.6               10.0 +/-    0.55      11.0 +/-    0.55  0.050 / 0.040
G21     41.6           77.0               11.9 +/-    0.64      12.2 +/-    0.64  0.050 / 0.050
G24     111.5          21.0               12.4 +/-    1.04      26.7 +/-    1.04  0.050 / 0.070
G27     311.9          27.5                9.4 +/-    1.11      17.4 +/-    1.11  0.050 / 0.060
G29     168.2          19.5               13.6 +/-    1.43      30.4 +/-    1.43  0.080 / 0.160
G32     206.1          20.6               13.3 +/-    1.07      28.8 +/-    1.07  0.110 / 0.160