PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/29-10:12:50
G07     331.3          57.9                4.3 +/-    0.79       5.0 +/-    0.79  0.280 / 0.510
G08     112.6          50.2                7.2 +/-    0.64       9.1 +/-    0.64  0.170 / 0.390
G09     204.1          78.9                5.5 +/-    0.22       5.6 +/-    0.22  0.040 / 0.040
G11     148.8          11.0                1.6 +/-   12.09       4.4 +/-   12.09  0.040 / 0.040
G16     45.6           10.3                2.8 +/-    3.13       7.7 +/-    3.13  0.060 / 0.060
G23     152.4          42.8                5.6 +/-    1.41       7.8 +/-    1.41  0.080 / 0.070
G27     60.7           34.2                5.4 +/-    1.25       8.6 +/-    1.25  0.030 / 0.020
G28     232.2          19.8                4.0 +/-    2.40       8.9 +/-    2.40  0.030 / 0.030
G30     298.6          32.7                4.6 +/-    1.40       7.7 +/-    1.40  0.150 / 0.440