PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-15:27:50
G03     216.1          62.0               12.8 +/-    1.31      14.3 +/-    1.31  0.170 / 0.300
G07     252.6          11.2               -1.3 +/-   21.07      -3.5 +/-   21.07  0.150 / 0.330
G09     307.2          23.0                9.6 +/-    2.23      19.6 +/-    2.23  0.040 / 0.050
G14     104.5          12.7                8.6 +/-    1.83      22.6 +/-    1.83  0.030 / 0.050
G16     107.9          63.2               10.3 +/-    0.97      11.4 +/-    0.97  0.050 / 0.040
G22     186.0          44.2               11.5 +/-    0.99      15.7 +/-    0.99  0.040 / 0.040
G23     329.8          58.8               10.1 +/-    0.54      11.6 +/-    0.54  0.140 / 0.190
G26     57.9           45.9                9.8 +/-    0.92      13.0 +/-    0.92  0.120 / 0.160
G31     56.7           12.6                6.7 +/-    1.41      17.6 +/-    1.41  0.050 / 0.070