PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-14:27:50
G05     50.2           14.0                2.6 +/-    0.82       6.7 +/-    0.82  0.070 / 0.140
G10     238.6          14.4                4.7 +/-    1.50      11.7 +/-    1.50  0.060 / 0.140
G13     72.3           36.8                4.0 +/-    0.47       6.2 +/-    0.47  0.060 / 0.070
G15     115.4          54.3                7.5 +/-    0.58       9.0 +/-    0.58  0.050 / 0.060
G16     314.4          11.3                1.8 +/-    2.73       4.8 +/-    2.73  0.040 / 0.040
G18     250.1          47.0                4.5 +/-    1.21       5.9 +/-    1.21  0.040 / 0.040
G20     26.8           65.7                3.3 +/-    0.70       3.6 +/-    0.70  0.160 / 0.190
G21     321.7          53.5                2.7 +/-    1.72       3.3 +/-    1.72  0.140 / 0.250
G26     285.9          19.4                2.0 +/-    1.63       4.6 +/-    1.63  0.150 / 0.440
G29     155.8          63.8                7.1 +/-    0.99       7.8 +/-    0.99  0.160 / 0.480