PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/16-07:13:10
G02     53.9           36.8                3.5 +/-    1.32       5.4 +/-    1.32  0.050 / 0.060
G05     71.7           66.3                5.3 +/-    0.41       5.7 +/-    0.41  0.060 / 0.110
G12     187.9          42.8                5.3 +/-    0.68       7.4 +/-    0.68  0.160 / 0.350
G13     133.2          10.0               -6.2 +/-    9.17     -17.3 +/-    9.17  0.390 / 0.550
G21     267.2          16.7                4.2 +/-    2.97      10.1 +/-    2.97  0.180 / 0.430
G25     243.6          56.5                4.5 +/-    0.91       5.3 +/-    0.91  0.030 / 0.030
G29     326.8          51.4                3.5 +/-    0.96       4.4 +/-    0.96  0.030 / 0.020