PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-17:42:40
G07     54.6           67.3                8.4 +/-    1.04       9.0 +/-    1.04  0.080 / 0.140
G08     54.7           43.1                8.8 +/-    0.89      12.2 +/-    0.89  0.130 / 0.120
G09     179.6          43.2               11.2 +/-    0.70      15.6 +/-    0.70  0.030 / 0.030
G11     122.4          33.0                9.3 +/-    1.06      15.4 +/-    1.06  0.050 / 0.030
G18     106.4          14.0                8.8 +/-    2.17      22.4 +/-    2.17  0.040 / 0.030
G23     160.4          12.4                7.8 +/-    1.88      20.7 +/-    1.88  0.030 / 0.040
G27     38.5           12.8                7.1 +/-    2.32      18.7 +/-    2.32  0.110 / 0.330
G28     264.1          46.1                9.9 +/-    3.15      13.1 +/-    3.15  0.120 / 0.140
G30     329.2          58.0                8.9 +/-    0.38      10.3 +/-    0.38  0.130 / 0.410