PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-10:27:50
G01     313.0          28.7                4.8 +/-    1.66       8.6 +/-    1.66  0.100 / 0.120
G10     97.5           44.2                6.3 +/-    0.92       8.5 +/-    0.92  0.120 / 0.100
G11     289.4          27.4                5.0 +/-    3.39       9.3 +/-    3.39  0.040 / 0.040
G14     339.2          70.1                4.4 +/-    0.96       4.7 +/-    0.96  0.040 / 0.050
G18     287.1          49.3                4.4 +/-    1.23       5.6 +/-    1.23  0.080 / 0.130
G20     115.5          19.6                4.1 +/-    1.20       9.1 +/-    1.20  0.120 / 0.140
G22     308.1          24.0                4.1 +/-    1.66       8.1 +/-    1.66  0.040 / 0.050
G25     89.1           13.5                3.8 +/-    2.04       9.8 +/-    2.04  0.040 / 0.050
G31     172.5          55.5                6.7 +/-    0.53       7.9 +/-    0.53  0.050 / 0.030
G32     19.3           61.8                5.3 +/-    0.60       5.9 +/-    0.60  0.040 / 0.030