PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-16:12:40
G10     272.1          40.5                7.2 +/-    1.00      10.3 +/-    1.00  0.130 / 0.120
G13     40.3           15.6                5.8 +/-    2.12      14.2 +/-    2.12  0.070 / 0.140
G15     53.8           43.6                7.2 +/-    0.99       9.9 +/-    0.99  0.050 / 0.090
G18     316.4          66.6                7.4 +/-    0.54       7.9 +/-    0.54  0.050 / 0.100
G20     56.6           33.6                5.3 +/-    1.61       8.6 +/-    1.61  0.200 / 0.530
G24     117.3          16.8                9.8 +/-    1.53      23.3 +/-    1.53  0.100 / 0.440
G27     315.4          23.7                5.7 +/-    1.15      11.6 +/-    1.15  0.160 / 0.520
G29     166.6          22.2                9.4 +/-    0.80      19.5 +/-    0.80  0.220 / 0.380
G32     205.5          12.8                9.9 +/-    2.88      25.8 +/-    2.88  0.130 / 0.220