PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-16:58:10
G10     296.2          51.1                8.7 +/-    1.37      10.8 +/-    1.37  0.090 / 0.090
G14     210.2          11.8                2.2 +/-   24.27       5.9 +/-   24.27  0.070 / 0.080
G15     45.9           27.2                7.5 +/-    1.76      13.9 +/-    1.76  0.030 / 0.040
G18     2.2            65.8                8.8 +/-    0.73       9.6 +/-    0.73  0.040 / 0.050
G20     70.3           20.5                7.4 +/-    1.51      16.2 +/-    1.51  0.080 / 0.290
G21     104.3          69.1                9.5 +/-    0.87      10.1 +/-    0.87  0.080 / 0.220
G24     99.2           26.4               10.3 +/-    1.03      19.5 +/-    1.03  0.080 / 0.130
G27     299.4          34.9                9.8 +/-    0.80      15.6 +/-    0.80  0.080 / 0.140
G32     210.9          30.8               11.1 +/-    1.96      19.2 +/-    1.96  0.310 / 0.520