PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-14:12:40
G01     115.0          20.5                9.2 +/-    1.81      20.0 +/-    1.81  0.030 / 0.050
G07     94.3           60.9                9.0 +/-    1.27      10.2 +/-    1.27  0.030 / 0.050
G08     43.2           26.0                7.2 +/-    0.61      13.8 +/-    0.61  0.110 / 0.320
G09     175.1          20.4                7.5 +/-    1.97      16.4 +/-    1.97  0.070 / 0.340
G11     97.9           39.5                9.3 +/-    1.24      13.6 +/-    1.24  0.080 / 0.110
G13     316.6          20.9                4.3 +/-    1.84       9.2 +/-    1.84  0.110 / 0.140
G17     202.1          31.3                8.6 +/-    1.50      14.6 +/-    1.50  0.040 / 0.040
G28     300.9          58.7                7.1 +/-    0.68       8.2 +/-    0.68  0.040 / 0.030
G30     349.5          70.1                6.6 +/-    0.74       7.0 +/-    0.74  0.080 / 0.110