PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-14:12:40
G05     52.5           10.1                2.9 +/-    2.41       7.9 +/-    2.41  0.380 / 0.360
G10     243.2          20.6                4.2 +/-    4.29       9.1 +/-    4.29  0.090 / 0.330
G13     62.8           33.7                4.8 +/-    1.16       7.8 +/-    1.16  0.040 / 0.050
G15     108.2          57.4                5.3 +/-    0.68       6.1 +/-    0.68  0.040 / 0.040
G16     306.2          14.3                0.7 +/-    4.10       1.7 +/-    4.10  0.180 / 0.210
G20     258.6          44.7                6.6 +/-    3.37       9.0 +/-    3.37  0.160 / 0.210
G21     327.2          56.1                4.0 +/-    0.49       4.8 +/-    0.49  0.090 / 0.080
G26     279.6          18.0                4.2 +/-    0.73       9.8 +/-    0.73  0.090 / 0.090
G29     159.8          59.0                7.7 +/-    0.51       8.8 +/-    0.51  0.050 / 0.030