PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-16:58:10
G01     40.2           14.5                6.8 +/-    2.53      17.0 +/-    2.53  0.070 / 0.100
G06     174.1          41.7               11.1 +/-    1.04      15.7 +/-    1.04  0.080 / 0.110
G13     237.8          20.9                8.5 +/-    1.79      18.3 +/-    1.79  0.140 / 0.140
G17     11.4           67.1                8.8 +/-    0.45       9.5 +/-    0.45  0.140 / 0.260
G19     289.5          71.5                8.9 +/-    0.68       9.3 +/-    0.68  0.100 / 0.210
G24     316.7          19.3                8.4 +/-    1.16      18.8 +/-    1.16  0.100 / 0.250
G28     74.5           45.8                9.5 +/-    0.89      12.6 +/-    0.89  0.030 / 0.030
G30     155.5          27.8               10.0 +/-    1.05      18.3 +/-    1.05  0.030 / 0.030