PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/06-16:42:40
G07     20.8           67.3                9.5 +/-    0.94      10.3 +/-    0.94  0.070 / 0.110
G08     70.4           50.3               10.3 +/-    0.67      12.9 +/-    0.67  0.070 / 0.120
G09     182.2          56.9               10.4 +/-    0.33      12.2 +/-    0.33  0.040 / 0.040
G11     133.3          25.0               13.5 +/-    2.89      26.4 +/-    2.89  0.040 / 0.040
G23     159.2          24.2               11.2 +/-    1.45      22.3 +/-    1.45  0.050 / 0.040
G27     43.7           22.4                8.2 +/-    1.62      17.0 +/-    1.62  0.040 / 0.040
G28     250.0          37.6               11.2 +/-    1.76      16.9 +/-    1.76  0.110 / 0.130
G30     317.3          48.7                9.8 +/-    0.95      12.5 +/-    0.95  0.200 / 0.220