PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/18-09:12:30
G02     34.0           55.0                3.0 +/-    0.92       3.6 +/-    0.92  0.030 / 0.040
G05     140.7          60.9                5.0 +/-    0.39       5.7 +/-    0.39  0.030 / 0.030
G06     51.8           20.7                2.8 +/-    3.37       6.0 +/-    3.37  0.150 / 0.240
G12     206.5          70.6                4.2 +/-    0.39       4.5 +/-    0.39  0.100 / 0.170
G19     99.2           10.2                6.1 +/-    3.00      17.0 +/-    3.00  0.030 / 0.030
G20     200.0          21.2                3.6 +/-    1.41       7.7 +/-    1.41  0.030 / 0.030
G25     299.8          52.0                2.9 +/-    1.69       3.5 +/-    1.69  0.250 / 0.220
G29     307.4          28.9                1.8 +/-    0.57       3.1 +/-    0.57  0.200 / 0.220