PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-04:57:40
G08     269.5          19.8                7.1 +/-    2.11      15.7 +/-    2.11  0.040 / 0.020
G10     51.6           60.6                5.6 +/-    0.75       6.3 +/-    0.75  0.030 / 0.020
G11     312.4          16.9                4.0 +/-    2.28       9.6 +/-    2.28  0.270 / 0.470
G14     260.7          65.3                7.4 +/-    0.76       8.1 +/-    0.76  0.180 / 0.410
G18     86.5           40.6                5.6 +/-    1.96       8.1 +/-    1.96  0.030 / 0.020
G21     153.5          19.4                7.0 +/-    3.73      15.7 +/-    3.73  0.030 / 0.020
G24     42.1           14.3                4.3 +/-    2.84      10.8 +/-    2.84  0.120 / 0.240
G27     233.5          18.1                7.7 +/-    3.82      17.7 +/-    3.82  0.130 / 0.230
G31     178.9          26.4                8.1 +/-    1.59      15.3 +/-    1.59  0.070 / 0.130
G32     320.3          75.5                6.7 +/-    0.30       6.9 +/-    0.30  0.100 / 0.220