PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-08:58:10
G02     33.4           55.6                4.2 +/-    0.42       5.0 +/-    0.42  0.030 / 0.040
G05     141.7          60.3                7.7 +/-    0.52       8.7 +/-    0.52  0.040 / 0.050
G06     51.5           21.1                2.6 +/-    1.15       5.6 +/-    1.15  0.030 / 0.040
G12     208.0          71.4                6.4 +/-    1.13       6.7 +/-    1.13  0.030 / 0.040
G19     98.5           10.7                6.1 +/-    3.15      16.9 +/-    3.15  0.090 / 0.290
G20     200.0          20.3                6.7 +/-    2.24      14.7 +/-    2.24  0.090 / 0.320
G25     300.8          51.4                5.0 +/-    1.10       6.2 +/-    1.10  0.060 / 0.130
G29     306.8          28.3                2.7 +/-    0.79       5.0 +/-    0.79  0.080 / 0.130