PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-22:57:40
G02     217.7          62.8               12.5 +/-    0.97      13.9 +/-    0.97  0.070 / 0.070
G06     56.6           75.5               10.4 +/-    0.92      10.7 +/-    0.92  0.080 / 0.090
G12     318.0          35.0                9.8 +/-    1.60      15.5 +/-    1.60  0.080 / 0.290
G17     58.8           30.7               11.0 +/-    0.85      18.9 +/-    0.85  0.080 / 0.270
G19     41.5           47.6               11.1 +/-    0.78      14.4 +/-    0.78  0.040 / 0.050
G24     261.5          41.1               13.5 +/-    1.47      19.2 +/-    1.47  0.040 / 0.040
G28     122.5          16.3               12.9 +/-    1.86      31.1 +/-    1.86  0.040 / 0.090