PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/09-17:27:50
G02     208.3          43.4               14.1 +/-    1.13      19.5 +/-    1.13  0.050 / 0.060
G06     122.1          78.8               13.1 +/-    0.67      13.3 +/-    0.67  0.050 / 0.080
G12     314.0          25.5                9.0 +/-    1.82      17.5 +/-    1.82  0.060 / 0.060
G19     26.0           56.3               11.9 +/-    0.95      14.0 +/-    0.95  0.060 / 0.070
G24     285.8          41.3               17.3 +/-    1.75      24.6 +/-    1.75  0.210 / 0.130
G28     113.4          22.8               11.9 +/-    1.15      24.5 +/-    1.15  0.080 / 0.130