PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-21:57:30
G02     202.8          34.5               15.0 +/-    2.25      24.0 +/-    2.25  0.070 / 0.100
G06     165.4          66.6               12.5 +/-    0.81      13.4 +/-    0.81  0.070 / 0.090
G12     306.0          12.5                9.9 +/-    2.16      26.1 +/-    2.16  0.050 / 0.110
G17     35.7           49.2               11.4 +/-    0.38      14.5 +/-    0.38  0.050 / 0.120
G19     0.6            65.5               11.0 +/-    0.57      11.9 +/-    0.57  0.050 / 0.110
G24     297.5          38.4               12.6 +/-    1.75      18.8 +/-    1.75  0.050 / 0.080
G28     99.4           35.5               12.9 +/-    0.45      20.4 +/-    0.45  0.110 / 0.280