PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/16-15:12:40
G10     276.2          43.6                4.8 +/-    1.41       6.6 +/-    1.41  0.040 / 0.040
G13     38.8           11.7                3.3 +/-    1.70       9.0 +/-    1.70  0.030 / 0.040
G15     52.8           43.5                4.2 +/-    0.94       5.8 +/-    0.94  0.060 / 0.050
G20     314.3          63.3                4.7 +/-    0.76       5.2 +/-    0.76  0.050 / 0.050
G21     41.9           75.7                4.8 +/-    0.64       5.0 +/-    0.64  0.120 / 0.200
G24     109.2          19.0                7.4 +/-    1.60      16.7 +/-    1.60  0.110 / 0.180
G27     315.8          22.7                2.2 +/-    1.22       4.6 +/-    1.22  0.170 / 0.340
G29     167.4          21.6                6.3 +/-    0.99      13.3 +/-    0.99  0.210 / 0.470
G32     205.8          15.5                7.1 +/-    2.01      17.5 +/-    2.01  0.090 / 0.130