PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-16:28:10
G01     54.7           27.9                7.0 +/-    0.66      12.9 +/-    0.66  0.090 / 0.130
G06     178.7          20.3               11.9 +/-    1.51      26.0 +/-    1.51  0.060 / 0.160
G07     144.0          14.0               10.8 +/-    2.53      27.6 +/-    2.53  0.040 / 0.040
G11     45.4           16.6                7.7 +/-    1.22      18.4 +/-    1.22  0.060 / 0.050
G13     258.5          32.9                9.9 +/-    1.16      16.4 +/-    1.16  0.030 / 0.030
G15     292.5          15.4                7.8 +/-    2.52      19.3 +/-    2.52  0.020 / 0.020
G17     298.1          80.0               11.0 +/-    0.89      11.1 +/-    0.89  0.130 / 0.420
G19     240.0          57.7                9.8 +/-    1.35      11.3 +/-    1.35  0.100 / 0.350
G28     44.4           54.8                9.3 +/-    1.09      11.1 +/-    1.09  0.050 / 0.100
G30     146.9          49.4               11.0 +/-    0.90      14.0 +/-    0.90  0.050 / 0.100