PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-18:13:10
G01     227.7          18.2               12.7 +/-    1.81      29.3 +/-    1.81  0.030 / 0.030
G03     284.9          69.5               11.1 +/-    0.52      11.8 +/-    0.52  0.030 / 0.030
G14     84.5           26.6               10.5 +/-    2.18      19.8 +/-    2.18  0.110 / 0.200
G16     148.8          43.3               13.3 +/-    1.41      18.4 +/-    1.41  0.090 / 0.130
G22     215.1          71.5               13.3 +/-    0.48      13.9 +/-    0.48  0.050 / 0.080
G23     307.0          37.5               12.0 +/-    1.25      18.2 +/-    1.25  0.060 / 0.070
G26     99.4           53.8               12.2 +/-    0.83      14.7 +/-    0.83  0.050 / 0.060
G31     44.8           32.9                9.7 +/-    1.09      16.0 +/-    1.09  0.040 / 0.050