PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-20:57:30
G01     225.5          16.6                7.9 +/-    2.28      18.8 +/-    2.28  0.110 / 0.270
G03     285.1          68.4                7.0 +/-    0.80       7.5 +/-    0.80  0.120 / 0.270
G14     87.4           23.0                8.5 +/-    1.20      17.4 +/-    1.20  0.060 / 0.080
G16     147.9          44.7               12.5 +/-    0.84      16.9 +/-    0.84  0.050 / 0.070
G22     215.0          69.8                8.2 +/-    1.06       8.7 +/-    1.06  0.090 / 0.240
G23     306.7          36.0                7.6 +/-    1.39      11.9 +/-    1.39  0.090 / 0.270
G26     101.7          55.2                9.6 +/-    0.48      11.5 +/-    0.48  0.030 / 0.060
G31     44.2           36.1                6.5 +/-    1.67      10.1 +/-    1.67  0.030 / 0.050