PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-18:27:50
G01     227.1          17.7               10.5 +/-    2.75      24.5 +/-    2.75  0.040 / 0.040
G03     283.0          69.8                9.4 +/-    0.70      10.0 +/-    0.70  0.040 / 0.040
G14     85.3           26.1                9.8 +/-    1.55      18.6 +/-    1.55  0.040 / 0.120
G16     148.3          44.0               12.0 +/-    1.37      16.4 +/-    1.37  0.050 / 0.090
G22     213.6          70.9               10.3 +/-    0.72      10.9 +/-    0.72  0.040 / 0.070
G23     307.5          37.9                8.2 +/-    2.05      12.4 +/-    2.05  0.050 / 0.070
G26     98.1           54.0                8.8 +/-    0.52      10.6 +/-    0.52  0.100 / 0.190
G31     45.0           32.4                7.7 +/-    2.09      12.9 +/-    2.09  0.110 / 0.150