PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-17:57:40
G08     270.8          19.0                8.4 +/-    2.87      19.0 +/-    2.87  0.170 / 0.170
G10     54.8           59.9                9.3 +/-    0.67      10.6 +/-    0.67  0.170 / 0.210
G11     314.0          14.4                6.2 +/-    1.62      15.6 +/-    1.62  0.110 / 0.150
G14     260.7          64.2               10.0 +/-    0.94      10.9 +/-    0.94  0.160 / 0.230
G18     90.2           36.4                9.5 +/-    1.20      14.7 +/-    1.20  0.090 / 0.150
G21     152.7          13.9               12.0 +/-    2.66      30.8 +/-    2.66  0.100 / 0.120
G24     41.4           13.1                7.5 +/-    2.74      19.6 +/-    2.74  0.020 / 0.020
G27     232.9          17.4               10.7 +/-    2.31      25.1 +/-    2.31  0.020 / 0.020
G31     179.7          26.6               12.3 +/-    0.82      23.3 +/-    0.82  0.040 / 0.050
G32     326.1          75.2               10.8 +/-    0.29      11.1 +/-    0.29  0.040 / 0.050