PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-15:43:00
G03     219.6          64.1               11.8 +/-    1.00      13.0 +/-    1.00  0.150 / 0.440
G09     305.9          21.1                9.7 +/-    3.59      20.7 +/-    3.59  0.160 / 0.340
G14     102.6          14.1                9.7 +/-    2.58      24.7 +/-    2.58  0.040 / 0.060
G16     114.2          62.2               12.1 +/-    0.41      13.5 +/-    0.41  0.050 / 0.060
G22     187.2          47.1               12.7 +/-    0.81      16.6 +/-    0.81  0.040 / 0.040
G23     327.1          56.5               11.1 +/-    0.69      13.0 +/-    0.69  0.040 / 0.040
G26     60.8           47.6               10.0 +/-    0.51      13.0 +/-    0.51  0.040 / 0.050
G31     55.3           14.4                8.9 +/-    4.00      22.4 +/-    4.00  0.050 / 0.070