PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/25-16:28:00
G08     294.6          23.7                6.3 +/-    1.47      12.7 +/-    1.47  0.050 / 0.080
G10     2.0            62.8                5.8 +/-    0.34       6.5 +/-    0.34  0.050 / 0.080
G14     227.0          44.3                9.7 +/-    0.93      13.3 +/-    0.93  0.060 / 0.120
G18     317.3          10.1              -11.6 +/-   10.70     -32.2 +/-   10.70  0.070 / 0.120
G20     61.0           53.8                6.3 +/-    0.60       7.6 +/-    0.60  0.070 / 0.090
G21     144.3          39.8                8.9 +/-    1.26      13.0 +/-    1.26  0.070 / 0.090
G24     55.7           24.1                5.3 +/-    1.04      10.5 +/-    1.04  0.040 / 0.040
G27     261.1          33.2                7.0 +/-    0.86      11.5 +/-    0.86  0.030 / 0.030
G32     239.2          63.9                8.2 +/-    1.18       9.0 +/-    1.18  0.110 / 0.130