PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-18:43:10
G05     50.4           14.1                7.1 +/-    1.88      18.0 +/-    1.88  0.050 / 0.060
G10     239.8          18.4                9.8 +/-    1.33      22.3 +/-    1.33  0.050 / 0.070
G13     67.5           34.3                9.8 +/-    1.11      15.8 +/-    1.11  0.060 / 0.100
G15     114.7          55.7               10.9 +/-    0.44      12.9 +/-    0.44  0.080 / 0.130
G16     308.5          14.5                6.1 +/-    4.00      15.2 +/-    4.00  0.030 / 0.040
G20     254.5          42.4               10.4 +/-    2.34      14.5 +/-    2.34  0.030 / 0.040
G21     318.6          50.0                9.0 +/-    0.78      11.3 +/-    0.78  0.090 / 0.510
G26     281.6          19.4                7.7 +/-    0.88      17.2 +/-    0.88  0.120 / 0.490
G29     157.7          66.6               11.1 +/-    0.57      12.0 +/-    0.57  0.100 / 0.240