PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-07:57:50
G07     16.7           68.0                3.6 +/-    0.72       3.8 +/-    0.72  0.060 / 0.130
G08     69.1           51.1                5.2 +/-    0.36       6.4 +/-    0.36  0.060 / 0.120
G09     179.0          51.4                6.8 +/-    1.00       8.4 +/-    1.00  0.020 / 0.040
G11     133.1          27.0                6.0 +/-    1.04      11.2 +/-    1.04  0.030 / 0.040
G23     159.3          20.0                5.3 +/-    1.69      11.6 +/-    1.69  0.110 / 0.150
G27     41.5           19.0                2.7 +/-    0.91       6.2 +/-    0.91  0.100 / 0.110
G28     252.1          37.7                6.2 +/-    1.19       9.4 +/-    1.19  0.070 / 0.190
G30     317.1          48.1                2.9 +/-    0.91       3.7 +/-    0.91  0.110 / 0.240