PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/08-18:12:50
G07     352.9          63.7               10.9 +/-    0.55      12.0 +/-    0.55  0.040 / 0.040
G08     88.1           52.0               12.5 +/-    1.06      15.4 +/-    1.06  0.030 / 0.040
G09     187.8          69.1               11.1 +/-    0.88      11.8 +/-    0.88  0.130 / 0.150
G11     141.1          17.5               13.3 +/-    1.66      31.0 +/-    1.66  0.110 / 0.180
G23     157.3          36.7               12.5 +/-    0.95      19.3 +/-    0.95  0.030 / 0.020
G27     51.8           30.2               10.0 +/-    1.17      17.5 +/-    1.17  0.030 / 0.030
G28     240.0          29.6               14.0 +/-    1.44      24.7 +/-    1.44  0.090 / 0.090
G30     306.8          39.8               11.0 +/-    1.02      16.0 +/-    1.02  0.090 / 0.090