PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-10:57:50
G01     109.5          23.0                4.2 +/-    0.96       8.7 +/-    0.96  0.090 / 0.230
G07     102.5          58.5                5.5 +/-    0.34       6.3 +/-    0.34  0.080 / 0.220
G08     43.2           27.9                2.5 +/-    0.89       4.7 +/-    0.89  0.040 / 0.070
G09     175.5          17.7                4.8 +/-    1.06      11.3 +/-    1.06  0.040 / 0.080
G11     95.1           43.6                5.7 +/-    0.43       7.8 +/-    0.43  0.040 / 0.080
G13     311.9          27.3                4.1 +/-    0.85       7.7 +/-    0.85  0.040 / 0.080
G17     204.5          30.1                5.4 +/-    2.21       9.5 +/-    2.21  0.030 / 0.030
G18     83.7           23.5                2.5 +/-    1.08       5.0 +/-    1.08  0.030 / 0.040
G28     298.2          56.7                3.7 +/-    1.09       4.3 +/-    1.09  0.080 / 0.220
G30     6.3            75.8                5.2 +/-    0.33       5.4 +/-    0.33  0.060 / 0.180