PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-01:57:50
G01     311.4          29.4                4.5 +/-    1.33       8.0 +/-    1.33  0.030 / 0.040
G10     99.2           45.0                6.4 +/-    0.63       8.6 +/-    0.63  0.030 / 0.050
G11     286.8          28.9                6.4 +/-    0.88      11.5 +/-    0.88  0.140 / 0.200
G14     347.1          69.0                5.6 +/-    0.70       5.9 +/-    0.70  0.100 / 0.220
G18     113.2          18.9                5.8 +/-    2.64      13.1 +/-    2.64  0.080 / 0.120
G22     307.1          20.7                6.5 +/-    2.52      14.0 +/-    2.52  0.080 / 0.120
G25     85.0           14.5                5.7 +/-    2.84      14.4 +/-    2.84  0.030 / 0.040
G31     174.2          56.6                7.0 +/-    0.68       8.2 +/-    0.68  0.030 / 0.030
G32     25.3           58.9                4.6 +/-    0.94       5.3 +/-    0.94  0.120 / 0.190