PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-05:27:50
G10     277.6          43.7                5.6 +/-    1.13       7.7 +/-    1.13  0.050 / 0.030
G13     38.6           11.1                3.0 +/-    5.19       8.2 +/-    5.19  0.050 / 0.030
G15     51.5           41.3                3.8 +/-    0.76       5.3 +/-    0.76  0.110 / 0.120
G20     2.0            66.2                3.9 +/-    0.41       4.2 +/-    0.41  0.090 / 0.130
G21     31.2           76.5                4.7 +/-    1.15       4.8 +/-    1.15  0.340 / 0.470
G24     111.9          19.5                4.2 +/-    1.02       9.4 +/-    1.02  0.110 / 0.310
G27     313.2          26.1                4.1 +/-    2.31       7.9 +/-    2.31  0.080 / 0.150
G29     168.9          22.1                4.3 +/-    1.51       9.1 +/-    1.51  0.110 / 0.160
G32     205.6          19.4                5.3 +/-    3.85      11.8 +/-    3.85  0.090 / 0.130