PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-13:27:50
G07     21.6           68.8                7.1 +/-    1.01       7.5 +/-    1.01  0.040 / 0.050
G08     60.1           46.6                5.1 +/-    0.57       6.7 +/-    0.57  0.040 / 0.050
G09     178.1          45.8                8.8 +/-    0.48      11.8 +/-    0.48  0.030 / 0.030
G11     127.9          29.1                8.2 +/-    1.59      14.7 +/-    1.59  0.030 / 0.030
G18     112.6          11.4                7.8 +/-    1.22      21.1 +/-    1.22  0.090 / 0.460
G23     159.9          16.1                6.7 +/-    2.31      16.3 +/-    2.31  0.100 / 0.280
G27     39.7           15.5                6.2 +/-    2.17      15.3 +/-    2.17  0.130 / 0.320
G28     261.6          46.8                7.1 +/-    5.04       9.4 +/-    5.04  0.130 / 0.230
G30     321.7          51.7                5.9 +/-    0.46       7.3 +/-    0.46  0.160 / 0.280