PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-15:12:40
G10     254.3          29.0                4.5 +/-    3.05       8.0 +/-    3.05  0.100 / 0.290
G13     50.6           28.4                4.4 +/-    2.10       8.1 +/-    2.10  0.140 / 0.270
G15     75.9           55.1                6.8 +/-    0.61       8.1 +/-    0.61  0.050 / 0.040
G16     295.4          13.7                1.7 +/-    2.37       4.3 +/-    2.37  0.070 / 0.050
G18     278.5          60.2                4.4 +/-    0.86       5.0 +/-    0.86  0.080 / 0.390
G20     43.6           47.7                4.2 +/-    0.91       5.5 +/-    0.91  0.110 / 0.380
G21     349.3          66.6                4.0 +/-    0.81       4.4 +/-    0.81  0.050 / 0.040
G26     266.1          13.7                2.8 +/-    2.06       7.2 +/-    2.06  0.050 / 0.050
G29     164.0          41.1                7.5 +/-    0.86      10.7 +/-    0.86  0.140 / 0.100