PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-04:57:50
G02     232.5          74.5                2.9 +/-    0.50       3.0 +/-    0.50  0.250 / 0.220
G05     172.5          13.4                4.3 +/-    1.43      11.2 +/-    1.43  0.220 / 0.220
G06     42.1           64.9                1.8 +/-    0.42       2.0 +/-    0.42  0.040 / 0.050
G12     321.0          46.4                2.2 +/-    0.59       2.9 +/-    0.59  0.040 / 0.050
G17     66.9           26.2                1.4 +/-    1.48       2.6 +/-    1.48  0.080 / 0.100
G19     53.3           41.0                1.5 +/-    2.09       2.2 +/-    2.09  0.050 / 0.090
G24     250.7          37.1                4.1 +/-    0.74       6.3 +/-    0.74  0.020 / 0.030