PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-17:57:50
G02     204.7          32.0               11.5 +/-    1.56      19.3 +/-    1.56  0.070 / 0.090
G06     156.4          70.7               10.2 +/-    0.81      10.7 +/-    0.81  0.060 / 0.090
G12     309.0          17.5                8.2 +/-    2.02      19.3 +/-    2.02  0.100 / 0.150
G17     39.8           46.1                8.3 +/-    0.76      11.0 +/-    0.76  0.100 / 0.140
G19     9.4            63.3                8.8 +/-    0.41       9.8 +/-    0.41  0.030 / 0.050
G24     298.5          37.6                9.5 +/-    0.94      14.3 +/-    0.94  0.040 / 0.060
G28     104.2          30.1               10.0 +/-    0.64      17.4 +/-    0.64  0.030 / 0.040