PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-00:27:50
G01     297.9          38.0                9.3 +/-    0.95      14.0 +/-    0.95  0.050 / 0.110
G03     309.4          10.8              -11.5 +/-   33.47     -31.5 +/-   33.47  0.050 / 0.100
G10     114.6          34.1               10.3 +/-    0.96      16.6 +/-    0.96  0.060 / 0.090
G11     270.7          28.1                9.2 +/-    0.96      16.8 +/-    0.96  0.070 / 0.100
G14     16.9           61.5                7.0 +/-    0.57       7.9 +/-    0.57  0.030 / 0.040
G22     312.2          32.3                7.2 +/-    2.14      12.1 +/-    2.14  0.030 / 0.040
G25     71.1           18.0                8.1 +/-    1.19      18.7 +/-    1.19  0.040 / 0.040
G31     166.0          71.9                9.1 +/-    0.98       9.5 +/-    0.98  0.030 / 0.030
G32     42.7           48.4                6.4 +/-    0.45       8.2 +/-    0.45  0.060 / 0.130