PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-11:13:10
G01     317.9          20.6                3.8 +/-    2.21       8.2 +/-    2.21  0.030 / 0.040
G08     258.6          11.5                6.7 +/-    1.14      18.0 +/-    1.14  0.030 / 0.050
G10     84.7           51.5                5.3 +/-    0.72       6.6 +/-    0.72  0.150 / 0.370
G11     301.6          23.3                3.4 +/-    1.35       7.0 +/-    1.35  0.150 / 0.390
G14     297.6          69.3                5.1 +/-    0.68       5.4 +/-    0.68  0.060 / 0.150
G18     302.1          41.8                5.7 +/-    1.01       8.1 +/-    1.01  0.060 / 0.160
G22     303.6          17.3                3.5 +/-    4.99       8.1 +/-    4.99  0.220 / 0.350
G25     99.2           9.9               -11.7 +/-   24.55     -32.7 +/-   24.55  0.250 / 0.190
G31     173.3          47.5                5.1 +/-    0.55       6.6 +/-    0.55  0.150 / 0.300
G32     16.7           63.9                6.4 +/-    0.52       7.1 +/-    0.52  0.350 / 0.330