PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-05:12:40
G02     247.2          78.7                3.6 +/-    0.39       3.7 +/-    0.39  0.130 / 0.190
G05     170.6          17.6                4.3 +/-    1.71      10.0 +/-    1.71  0.200 / 0.170
G06     40.1           59.9                3.8 +/-    0.58       4.4 +/-    0.58  0.030 / 0.050
G12     321.2          51.4                3.2 +/-    0.47       4.0 +/-    0.47  0.040 / 0.040
G17     71.1           23.2                2.7 +/-    2.02       5.5 +/-    2.02  0.050 / 0.030
G19     58.4           37.9                3.0 +/-    0.84       4.5 +/-    0.84  0.040 / 0.030
G24     245.3          34.4                7.5 +/-    1.72      12.1 +/-    1.72  0.040 / 0.090
G25     316.9          12.3                0.9 +/-   11.42       2.5 +/-   11.42  0.070 / 0.100