PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-16:28:00
G02     204.3          33.2               18.3 +/-    1.74      30.0 +/-    1.74  0.080 / 0.100
G06     157.9          70.4               16.2 +/-    1.15      17.1 +/-    1.15  0.060 / 0.090
G12     308.7          16.8               10.7 +/-    1.03      25.4 +/-    1.03  0.100 / 0.220
G17     39.8           46.0               11.8 +/-    0.66      15.6 +/-    0.66  0.100 / 0.190
G19     9.1            63.4               13.4 +/-    0.59      14.8 +/-    0.59  0.030 / 0.050
G24     298.5          37.6               12.8 +/-    1.36      19.4 +/-    1.36  0.040 / 0.070
G28     104.2          30.0               13.5 +/-    0.96      23.6 +/-    0.96  0.030 / 0.030