PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/21-16:28:10
G10     298.0          51.7                8.4 +/-    1.07      10.4 +/-    1.07  0.060 / 0.100
G14     210.6          12.7                7.5 +/-    5.17      19.7 +/-    5.17  0.050 / 0.090
G15     45.8           26.0                5.9 +/-    0.80      11.2 +/-    0.80  0.030 / 0.050
G18     5.3            65.5                6.3 +/-    1.00       6.8 +/-    1.00  0.030 / 0.110
G20     71.0           20.0                5.0 +/-    1.26      10.9 +/-    1.26  0.080 / 0.250
G21     106.7          68.6                9.1 +/-    0.97       9.7 +/-    0.97  0.080 / 0.260
G24     97.8           26.9                9.7 +/-    0.44      18.1 +/-    0.44  0.070 / 0.140
G27     298.1          35.4                7.2 +/-    0.80      11.3 +/-    0.80  0.070 / 0.140
G32     211.4          32.2                8.3 +/-    2.85      13.9 +/-    2.85  0.070 / 0.130