PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-21:27:50
G03     198.0          40.4               13.5 +/-    0.68      19.5 +/-    0.68  0.100 / 0.130
G07     270.5          25.0               12.9 +/-    1.81      25.1 +/-    1.81  0.090 / 0.130
G08     156.1          10.6               -5.9 +/-   42.17     -16.1 +/-   42.17  0.070 / 0.120
G09     317.0          41.2               11.3 +/-    0.85      16.1 +/-    0.85  0.080 / 0.090
G16     60.1           59.2               11.7 +/-    0.61      13.4 +/-    0.61  0.210 / 0.460
G22     183.0          25.0               12.5 +/-    1.06      24.5 +/-    1.06  0.230 / 0.410
G23     353.6          75.0               10.4 +/-    1.04      10.7 +/-    1.04  0.120 / 0.140
G26     44.7           29.8                9.3 +/-    1.58      16.3 +/-    1.58  0.130 / 0.190
G27     120.2          22.0               12.4 +/-    1.29      25.9 +/-    1.29  0.030 / 0.030