PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/06-08:28:10
G10     271.6          40.5                7.7 +/-    1.31      11.0 +/-    1.31  0.030 / 0.030
G13     40.3           15.5                3.9 +/-    2.21       9.6 +/-    2.21  0.030 / 0.030
G15     54.6           44.5                5.7 +/-    1.06       7.7 +/-    1.06  0.050 / 0.040
G20     41.5           52.1                5.6 +/-    1.02       6.8 +/-    1.02  0.040 / 0.060
G21     16.5           74.5                5.8 +/-    0.28       6.0 +/-    0.28  0.120 / 0.170
G24     117.0          16.6                6.0 +/-    1.35      14.5 +/-    1.35  0.160 / 0.140
G27     316.1          22.7                3.5 +/-    1.70       7.1 +/-    1.70  0.110 / 0.600
G29     168.3          26.5                5.5 +/-    1.01      10.3 +/-    1.01  0.180 / 0.540
G32     204.7          14.3                3.4 +/-    3.39       8.6 +/-    3.39  0.130 / 0.240