PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-04:12:40
G01     310.0          30.8                5.0 +/-    2.20       8.6 +/-    2.20  0.060 / 0.120
G10     101.3          43.8                6.5 +/-    0.90       8.9 +/-    0.90  0.070 / 0.110
G11     284.0          29.5                6.8 +/-    0.87      12.1 +/-    0.87  0.040 / 0.050
G14     352.4          68.1                4.4 +/-    0.58       4.7 +/-    0.58  0.040 / 0.060
G18     114.2          18.3                5.4 +/-    0.99      12.4 +/-    0.99  0.070 / 0.180
G22     308.1          22.9                4.6 +/-    1.02       9.4 +/-    1.02  0.080 / 0.160
G25     81.7           14.9                6.0 +/-    1.10      14.9 +/-    1.10  0.040 / 0.050
G31     171.2          60.0                7.8 +/-    0.98       8.9 +/-    0.98  0.030 / 0.050
G32     29.5           56.6                3.8 +/-    0.45       4.5 +/-    0.45  0.080 / 0.170