PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-07:12:40
G02     47.1           42.9                3.8 +/-    0.47       5.3 +/-    0.47  0.030 / 0.040
G05     98.4           68.9                5.0 +/-    0.70       5.3 +/-    0.70  0.040 / 0.030
G12     191.2          53.0                7.4 +/-    1.40       9.0 +/-    1.40  0.070 / 0.100
G20     203.7          35.3                5.9 +/-    1.27       9.3 +/-    1.27  0.050 / 0.100
G25     271.9          58.0                5.4 +/-    0.71       6.2 +/-    0.71  0.040 / 0.070
G29     317.6          40.0                3.5 +/-    1.33       5.1 +/-    1.33  0.050 / 0.060