PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-12:12:30
G05     49.7           14.7                1.4 +/-    1.49       3.4 +/-    1.49  0.120 / 0.200
G10     237.4          13.2               10.5 +/-    2.15      27.2 +/-    2.15  0.070 / 0.160
G13     74.4           36.9                5.2 +/-    0.57       8.0 +/-    0.57  0.050 / 0.040
G15     118.2          53.4                8.0 +/-    0.66       9.7 +/-    0.66  0.040 / 0.040
G18     248.5          46.1                5.0 +/-    1.21       6.6 +/-    1.21  0.050 / 0.050
G20     22.4           68.7                4.6 +/-    0.63       4.9 +/-    0.63  0.030 / 0.050
G21     317.9          51.0                4.1 +/-    0.96       5.1 +/-    0.96  0.130 / 0.240
G26     286.5          20.0                2.6 +/-    1.14       5.8 +/-    1.14  0.150 / 0.240
G29     155.4          67.3                6.2 +/-    0.99       6.6 +/-    0.99  0.040 / 0.120