PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-09:27:50
G10     67.1           57.1                5.7 +/-    0.44       6.7 +/-    0.44  0.040 / 0.050
G11     310.2          18.1                4.1 +/-    2.22       9.4 +/-    2.22  0.040 / 0.050
G14     268.2          64.2                5.5 +/-    0.78       6.1 +/-    0.78  0.180 / 0.300
G18     310.9          33.7                3.9 +/-    1.04       6.3 +/-    1.04  0.160 / 0.350
G20     106.7          11.5                4.4 +/-    3.21      11.9 +/-    3.21  0.190 / 0.360
G21     155.2          12.3                5.6 +/-    2.19      14.7 +/-    2.19  0.130 / 0.300
G27     228.9          13.5                4.7 +/-    3.83      12.1 +/-    3.83  0.140 / 0.460
G31     176.0          35.7                5.4 +/-    2.12       8.4 +/-    2.12  0.140 / 0.470
G32     355.2          71.6                6.0 +/-    0.43       6.3 +/-    0.43  0.100 / 0.230