PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-07:28:10
G02     36.6           52.6                3.7 +/-    1.51       4.5 +/-    1.51  0.030 / 0.030
G05     134.1          63.5                6.9 +/-    0.39       7.6 +/-    0.39  0.030 / 0.030
G06     53.8           17.2                2.1 +/-    3.89       5.0 +/-    3.89  0.180 / 0.140
G12     201.4          67.5                4.9 +/-    0.35       5.2 +/-    0.35  0.210 / 0.180
G20     200.9          22.8                5.1 +/-    2.12      10.4 +/-    2.12  0.030 / 0.030
G25     296.0          53.6                3.8 +/-    2.76       4.5 +/-    2.76  0.020 / 0.030
G29     309.0          30.2                3.0 +/-    1.59       5.3 +/-    1.59  0.050 / 0.050