PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/20-23:27:40
G01     318.1          19.9               11.1 +/-    2.56      24.4 +/-    2.56  0.130 / 0.350
G08     254.3          11.9               12.3 +/-    2.19      33.0 +/-    2.19  0.160 / 0.470
G10     82.6           52.7               10.2 +/-    0.67      12.4 +/-    0.67  0.150 / 0.310
G11     300.3          24.9               11.7 +/-    1.86      22.9 +/-    1.86  0.140 / 0.280
G14     308.2          71.4               10.6 +/-    0.98      11.1 +/-    0.98  0.030 / 0.030
G18     103.9          27.0               12.5 +/-    1.90      23.3 +/-    1.90  0.030 / 0.030
G22     301.4          11.3                4.1 +/-   12.55      11.1 +/-   12.55  0.050 / 0.070
G31     179.2          41.1               14.3 +/-    1.91      20.5 +/-    1.91  0.060 / 0.070
G32     5.1            67.5               10.8 +/-    0.95      11.6 +/-    0.95  0.060 / 0.060