PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/30-15:58:00
G08     299.1          23.1                6.1 +/-    1.44      12.5 +/-    1.44  0.030 / 0.020
G10     352.7          62.3                7.3 +/-    0.47       8.2 +/-    0.47  0.020 / 0.030
G14     223.6          40.4                8.5 +/-    2.06      12.3 +/-    2.06  0.050 / 0.060
G20     54.4           56.0                9.3 +/-    0.72      11.0 +/-    0.72  0.050 / 0.070
G21     141.7          43.7               11.2 +/-    0.45      15.4 +/-    0.45  0.090 / 0.110
G24     59.9           25.9                9.0 +/-    1.20      17.2 +/-    1.20  0.140 / 0.120
G27     266.3          34.7                8.7 +/-    2.53      13.8 +/-    2.53  0.060 / 0.090
G32     232.9          59.8                8.3 +/-    1.67       9.5 +/-    1.67  0.080 / 0.070