PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-21:57:20
G02     201.0          27.0               16.9 +/-    1.70      31.5 +/-    1.70  0.060 / 0.120
G06     171.0          58.2               16.2 +/-    0.98      18.7 +/-    0.98  0.060 / 0.090
G17     28.8           54.8               11.7 +/-    0.60      13.9 +/-    0.60  0.040 / 0.090
G19     341.9          69.4               12.2 +/-    0.58      13.0 +/-    0.58  0.040 / 0.110
G24     304.7          34.3               11.6 +/-    1.25      18.7 +/-    1.25  0.050 / 0.050
G28     91.4           40.0               13.4 +/-    0.48      19.5 +/-    0.48  0.050 / 0.050