PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-18:12:30
G02     205.7          35.0               19.5 +/-    0.78      30.9 +/-    0.78  0.060 / 0.080
G06     149.6          73.7               14.6 +/-    0.88      15.2 +/-    0.88  0.060 / 0.100
G12     310.6          20.0               13.8 +/-    1.43      30.3 +/-    1.43  0.040 / 0.060
G17     42.5           43.8               11.4 +/-    0.75      15.6 +/-    0.75  0.030 / 0.060
G19     14.9           61.3               12.9 +/-    0.78      14.5 +/-    0.78  0.100 / 0.260
G24     295.0          39.0               14.8 +/-    2.41      21.9 +/-    2.41  0.200 / 0.270
G28     107.0          28.1               12.2 +/-    1.74      22.3 +/-    1.74  0.040 / 0.030