PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-14:43:00
G03     217.2          62.3                9.2 +/-    1.31      10.3 +/-    1.31  0.140 / 0.250
G07     252.6          11.2               -1.0 +/-   19.72      -2.7 +/-   19.72  0.150 / 0.260
G09     307.3          23.2                6.8 +/-    0.94      13.9 +/-    0.94  0.030 / 0.050
G14     104.3          13.1                7.9 +/-    1.52      20.5 +/-    1.52  0.030 / 0.040
G16     107.3          63.1               10.0 +/-    0.40      11.1 +/-    0.40  0.110 / 0.340
G22     185.2          43.6                8.3 +/-    0.66      11.5 +/-    0.66  0.100 / 0.270
G23     330.5          59.3                7.5 +/-    0.71       8.6 +/-    0.71  0.040 / 0.030
G26     57.8           45.8                8.7 +/-    0.88      11.5 +/-    0.88  0.040 / 0.040
G31     56.7           12.5                6.2 +/-    1.20      16.3 +/-    1.20  0.060 / 0.060