PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-18:12:40
G08     278.7          21.4               10.1 +/-    1.22      21.5 +/-    1.22  0.130 / 0.120
G10     38.0           62.1                9.2 +/-    0.54      10.3 +/-    0.54  0.070 / 0.090
G14     246.8          58.6               10.1 +/-    0.59      11.7 +/-    0.59  0.210 / 0.220
G18     82.0           41.5                9.9 +/-    1.56      14.1 +/-    1.56  0.190 / 0.310
G21     150.7          21.1               12.5 +/-    1.00      26.8 +/-    1.00  0.180 / 0.180
G24     45.7           18.6                8.2 +/-    3.19      18.7 +/-    3.19  0.130 / 0.110
G27     239.3          22.8               10.9 +/-    1.98      22.5 +/-    1.98  0.030 / 0.020
G31     181.5          18.4               11.1 +/-    2.24      25.3 +/-    2.24  0.020 / 0.020
G32     290.1          75.4               10.0 +/-    0.32      10.3 +/-    0.32  0.050 / 0.040