PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-08:42:40
G02     58.5           32.6                2.3 +/-    1.81       3.8 +/-    1.81  0.030 / 0.030
G05     61.8           62.5                4.1 +/-    0.47       4.5 +/-    0.47  0.030 / 0.030
G12     186.9          37.1                5.9 +/-    0.93       9.0 +/-    0.93  0.040 / 0.070
G13     131.3          13.1                6.6 +/-    1.53      17.1 +/-    1.53  0.030 / 0.090
G15     164.2          10.5               -5.6 +/-   14.21     -15.6 +/-   14.21  0.160 / 0.290
G20     208.9          51.3                6.4 +/-    0.73       7.9 +/-    0.73  0.130 / 0.180
G21     269.6          17.5                4.8 +/-    1.64      11.2 +/-    1.64  0.050 / 0.070
G25     242.9          53.8                3.8 +/-    2.90       4.6 +/-    2.90  0.060 / 0.090
G29     327.6          53.3                3.2 +/-    1.00       3.9 +/-    1.00  0.040 / 0.050