PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-18:43:00
G08     272.3          19.7                7.6 +/-    2.41      16.8 +/-    2.41  0.210 / 0.220
G10     51.0           60.6                7.8 +/-    0.56       8.8 +/-    0.56  0.120 / 0.120
G11     314.9          13.5                5.6 +/-    1.80      14.4 +/-    1.80  0.120 / 0.590
G14     257.4          63.2                8.7 +/-    0.96       9.6 +/-    0.96  0.100 / 0.160
G18     88.3           37.7                8.9 +/-    1.21      13.4 +/-    1.21  0.070 / 0.120
G21     152.2          15.0                9.9 +/-    4.00      24.6 +/-    4.00  0.100 / 0.110
G24     42.3           14.4                7.2 +/-    4.61      18.1 +/-    4.61  0.020 / 0.020
G27     234.2          18.7                7.5 +/-    3.53      17.1 +/-    3.53  0.030 / 0.020
G31     180.4          24.3               10.1 +/-    3.04      20.1 +/-    3.04  0.040 / 0.050
G32     316.8          75.6                8.3 +/-    0.36       8.6 +/-    0.36  0.040 / 0.050