PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-22:28:10
G01     222.0          12.6                8.5 +/-    2.31      22.3 +/-    2.31  0.030 / 0.040
G03     267.4          70.0                9.1 +/-    1.28       9.6 +/-    1.28  0.030 / 0.040
G09     297.6          11.0              -12.5 +/-   23.37     -34.2 +/-   23.37  0.090 / 0.110
G14     92.2           20.3                8.8 +/-    2.72      19.3 +/-    2.72  0.070 / 0.140
G16     145.3          49.9               11.1 +/-    0.94      14.0 +/-    0.94  0.040 / 0.050
G22     205.4          65.4                9.4 +/-    0.35      10.2 +/-    0.35  0.030 / 0.050
G23     311.8          41.5                7.8 +/-    0.68      11.0 +/-    0.68  0.150 / 0.210
G26     87.8           55.2                8.2 +/-    0.83       9.8 +/-    0.83  0.130 / 0.210
G31     47.3           28.3                6.9 +/-    2.06      12.5 +/-    2.06  0.180 / 0.130