PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-15:27:50
G10     247.5          23.4                7.4 +/-    1.33      15.0 +/-    1.33  0.100 / 0.290
G13     58.0           32.9                5.0 +/-    1.20       8.3 +/-    1.20  0.290 / 0.250
G15     91.4           57.0                8.2 +/-    0.94       9.6 +/-    0.94  0.030 / 0.050
G16     303.6          13.6                4.2 +/-    1.54      10.7 +/-    1.54  0.040 / 0.040
G18     265.5          55.4                4.7 +/-    2.03       5.5 +/-    2.03  0.120 / 0.270
G20     37.9           54.3                4.0 +/-    0.86       4.8 +/-    0.86  0.120 / 0.330
G21     336.9          61.5                4.2 +/-    0.55       4.7 +/-    0.55  0.030 / 0.040
G26     274.0          16.6                7.6 +/-    2.49      18.1 +/-    2.49  0.030 / 0.040
G29     161.5          49.5                7.7 +/-    0.57       9.8 +/-    0.57  0.050 / 0.100