PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-17:58:00
G08     278.2          21.3               10.0 +/-    1.50      21.4 +/-    1.50  0.080 / 0.120
G10     39.4           62.0                8.0 +/-    0.47       8.9 +/-    0.47  0.060 / 0.140
G14     247.7          59.0               10.4 +/-    0.72      12.0 +/-    0.72  0.210 / 0.180
G18     82.7           41.0                9.2 +/-    1.29      13.2 +/-    1.29  0.100 / 0.150
G21     151.0          20.7               12.5 +/-    1.54      27.1 +/-    1.54  0.100 / 0.150
G24     45.3           18.2                7.9 +/-    2.86      18.2 +/-    2.86  0.110 / 0.140
G27     238.8          22.4               12.0 +/-    1.98      25.0 +/-    1.98  0.020 / 0.020
G31     181.2          19.1               13.3 +/-    2.04      30.0 +/-    2.04  0.030 / 0.020
G32     293.2          75.6                9.7 +/-    0.38       9.9 +/-    0.38  0.030 / 0.040