PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-18:42:40
G01     116.2          19.3               14.6 +/-    1.26      32.6 +/-    1.26  0.030 / 0.030
G07     95.0           59.4               12.8 +/-    0.79      14.6 +/-    0.79  0.030 / 0.040
G08     43.7           28.6                9.7 +/-    0.76      17.4 +/-    0.76  0.030 / 0.040
G09     177.3          24.6               11.4 +/-    1.66      22.4 +/-    1.66  0.030 / 0.040
G11     101.5          41.5               14.8 +/-    0.56      21.0 +/-    0.56  0.040 / 0.060
G13     316.0          22.3                8.9 +/-    2.32      18.6 +/-    2.32  0.040 / 0.060
G17     201.6          27.7               14.3 +/-    2.13      26.3 +/-    2.13  0.080 / 0.260
G18     89.1           21.6               13.2 +/-    1.16      28.1 +/-    1.16  0.080 / 0.270
G28     290.6          55.6               12.9 +/-    0.86      15.3 +/-    0.86  0.110 / 0.280
G30     356.2          72.1               11.7 +/-    0.89      12.2 +/-    0.89  0.100 / 0.230