PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-09:42:40
G07     17.2           67.8                5.2 +/-    0.71       5.6 +/-    0.71  0.120 / 0.230
G08     72.4           52.6                4.9 +/-    0.79       6.0 +/-    0.79  0.120 / 0.130
G09     180.0          52.9                7.8 +/-    0.69       9.6 +/-    0.69  0.100 / 0.210
G11     133.0          26.6                3.0 +/-    1.64       5.7 +/-    1.64  0.090 / 0.210
G23     158.8          19.6                4.3 +/-    1.68       9.5 +/-    1.68  0.040 / 0.050
G27     41.9           19.6                3.4 +/-    2.14       7.7 +/-    2.14  0.040 / 0.040
G28     251.7          37.7                8.2 +/-    1.52      12.4 +/-    1.52  0.030 / 0.030
G30     317.4          48.6                4.4 +/-    0.81       5.7 +/-    0.81  0.030 / 0.030