PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/02-15:57:50
G07     325.9          56.3                7.6 +/-    0.66       9.0 +/-    0.66  0.040 / 0.070
G08     116.7          46.6               11.5 +/-    0.55      15.1 +/-    0.55  0.040 / 0.060
G09     255.4          82.7                8.7 +/-    1.19       8.8 +/-    1.19  0.160 / 0.320
G16     43.4           19.1                6.9 +/-    0.86      15.5 +/-    0.86  0.200 / 0.280
G23     150.2          53.8               10.2 +/-    0.84      12.3 +/-    0.84  0.060 / 0.080
G27     69.8           36.9                8.1 +/-    0.66      12.3 +/-    0.66  0.120 / 0.230
G28     228.2          15.6               10.6 +/-    1.77      25.9 +/-    1.77  0.100 / 0.270
G30     293.7          29.4                7.0 +/-    2.07      12.5 +/-    2.07  0.090 / 0.230