PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-09:57:50
G05     47.9           18.6                2.7 +/-    1.11       6.2 +/-    1.11  0.050 / 0.140
G13     81.4           36.9                4.3 +/-    1.31       6.6 +/-    1.31  0.060 / 0.110
G15     126.9          50.1                6.1 +/-    1.43       7.7 +/-    1.43  0.050 / 0.050
G16     318.2          10.2               -7.2 +/-    4.72     -20.1 +/-    4.72  0.040 / 0.040
G20     9.7            75.0                3.9 +/-    0.77       4.0 +/-    0.77  0.060 / 0.090
G21     311.3          46.4                3.3 +/-    1.36       4.4 +/-    1.36  0.050 / 0.070
G25     201.9          14.0                3.5 +/-    2.27       8.9 +/-    2.27  0.110 / 0.470
G26     291.2          20.5                5.4 +/-    1.61      11.8 +/-    1.61  0.120 / 0.350
G29     151.1          74.8                5.7 +/-    0.75       5.9 +/-    0.75  0.150 / 0.300