PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-07:28:10
G02     31.8           57.0                2.5 +/-    0.61       2.9 +/-    0.61  0.030 / 0.030
G05     143.5          58.9                7.5 +/-    0.68       8.7 +/-    0.68  0.030 / 0.030
G06     50.9           21.5                1.0 +/-    1.19       2.0 +/-    1.19  0.030 / 0.040
G12     211.6          73.1                4.2 +/-    0.79       4.4 +/-    0.79  0.030 / 0.040
G19     97.0           12.0                5.6 +/-    1.61      14.8 +/-    1.61  0.110 / 0.230
G20     200.2          17.7                4.7 +/-    1.22      10.9 +/-    1.22  0.120 / 0.280
G25     303.2          49.9                3.5 +/-    0.94       4.4 +/-    0.94  0.060 / 0.050
G29     305.1          26.3                2.8 +/-    1.47       5.3 +/-    1.47  0.050 / 0.060