PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-17:12:50
G08     269.4          20.1                7.7 +/-    1.02      16.9 +/-    1.02  0.110 / 0.240
G10     53.8           59.4               10.3 +/-    0.74      11.8 +/-    0.74  0.200 / 0.350
G14     258.2          64.3               11.8 +/-    0.55      13.0 +/-    0.55  0.090 / 0.050
G18     313.3          31.4                7.3 +/-    1.86      12.5 +/-    1.86  0.070 / 0.050
G20     91.1           39.3               10.2 +/-    1.60      15.0 +/-    1.60  0.030 / 0.030
G21     153.0          16.1                9.6 +/-    1.39      23.3 +/-    1.39  0.030 / 0.020
G24     39.8           9.8                 8.2 +/-    1.60      23.0 +/-    1.60  0.130 / 0.260
G27     237.8          19.5                8.9 +/-    2.18      19.9 +/-    2.18  0.180 / 0.250
G31     182.1          22.3               11.0 +/-    1.26      22.9 +/-    1.26  0.130 / 0.300
G32     316.1          75.7               11.3 +/-    0.31      11.6 +/-    0.31  0.070 / 0.290