PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-13:13:10
G02     68.6           24.4                3.7 +/-    0.92       7.3 +/-    0.92  0.030 / 0.040
G05     48.8           52.4                3.2 +/-    0.60       3.9 +/-    0.60  0.030 / 0.040
G12     184.2          23.5                4.2 +/-    1.42       8.4 +/-    1.42  0.060 / 0.160
G13     121.2          21.9                6.8 +/-    0.82      14.3 +/-    0.82  0.080 / 0.150
G15     157.0          20.8                5.0 +/-    1.98      10.9 +/-    1.98  0.090 / 0.160
G18     221.0          11.4               -1.3 +/-   16.17      -3.4 +/-   16.17  0.050 / 0.210
G20     216.9          68.4                6.2 +/-    0.80       6.7 +/-    0.80  0.040 / 0.040
G21     281.8          28.1                3.1 +/-    1.38       5.6 +/-    1.38  0.030 / 0.040
G25     224.2          43.8                5.3 +/-    0.90       7.3 +/-    0.90  0.050 / 0.090
G29     340.7          68.5                1.5 +/-    1.17       1.6 +/-    1.17  0.060 / 0.070