PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-17:27:40
G08     286.7          22.5                6.7 +/-    0.97      13.9 +/-    0.97  0.110 / 0.170
G10     21.6           63.1                8.1 +/-    1.30       8.9 +/-    1.30  0.160 / 0.220
G14     237.1          52.3               10.7 +/-    2.00      13.1 +/-    2.00  0.030 / 0.020
G18     73.9           45.7                6.5 +/-    1.28       8.6 +/-    1.28  0.040 / 0.030
G21     148.4          28.8               11.0 +/-    1.72      19.7 +/-    1.72  0.080 / 0.120
G24     51.0           23.0                5.9 +/-    3.79      12.1 +/-    3.79  0.100 / 0.100
G27     246.0          27.5                9.4 +/-    2.11      17.4 +/-    2.11  0.140 / 0.270
G31     183.0          11.7                5.1 +/-   20.94      13.7 +/-   20.94  0.190 / 0.310
G32     263.3          72.3                7.4 +/-    0.60       7.8 +/-    0.60  0.030 / 0.020