PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/20-14:58:00
G10     250.0          25.6                7.3 +/-    1.68      14.1 +/-    1.68  0.030 / 0.050
G13     54.9           31.3                6.4 +/-    0.46      10.9 +/-    0.46  0.040 / 0.040
G15     85.1           56.6                6.7 +/-    0.50       7.8 +/-    0.50  0.150 / 0.430
G16     300.2          13.9                2.5 +/-    1.57       6.4 +/-    1.57  0.150 / 0.350
G18     270.3          57.5                6.8 +/-    0.70       7.9 +/-    0.70  0.040 / 0.050
G20     39.9           51.9                3.9 +/-    0.51       4.8 +/-    0.51  0.040 / 0.060
G21     341.1          63.4                5.1 +/-    0.37       5.7 +/-    0.37  0.050 / 0.110
G26     270.6          15.6                6.1 +/-    2.95      14.8 +/-    2.95  0.060 / 0.120
G29     162.7          46.5                8.4 +/-    0.90      11.0 +/-    0.90  0.120 / 0.280