PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-02:57:50
G08     280.3          20.9                8.9 +/-    2.40      19.1 +/-    2.40  0.040 / 0.050
G10     44.7           60.5                7.4 +/-    0.84       8.4 +/-    0.84  0.040 / 0.060
G14     247.3          59.1                8.4 +/-    0.77       9.7 +/-    0.77  0.100 / 0.210
G18     316.2          24.3                5.1 +/-    1.28      10.0 +/-    1.28  0.110 / 0.180
G20     85.1           43.3                8.5 +/-    0.72      11.7 +/-    0.72  0.080 / 0.110
G21     153.1          25.5                6.9 +/-    1.53      13.4 +/-    1.53  0.080 / 0.120
G24     44.7           16.9                5.2 +/-    3.37      12.3 +/-    3.37  0.170 / 0.310
G27     239.9          22.8                9.3 +/-    2.13      19.1 +/-    2.13  0.200 / 0.360
G31     179.3          21.7                6.7 +/-    2.70      14.1 +/-    2.70  0.030 / 0.030
G32     292.9          75.7                6.7 +/-    0.46       6.9 +/-    0.46  0.030 / 0.040