PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/16-09:27:40
G02     36.6           52.6                2.3 +/-    0.72       2.8 +/-    0.72  0.020 / 0.040
G05     135.3          63.4                6.5 +/-    0.68       7.2 +/-    0.68  0.030 / 0.040
G06     53.4           18.5                2.1 +/-    0.50       4.9 +/-    0.50  0.020 / 0.040
G12     201.7          67.5                3.6 +/-    0.58       3.8 +/-    0.58  0.020 / 0.040
G20     200.3          24.2                5.4 +/-    1.11      10.7 +/-    1.11  0.140 / 0.310
G25     295.4          54.0                3.3 +/-    0.92       4.0 +/-    0.92  0.100 / 0.280
G29     309.6          31.3                2.0 +/-    1.42       3.5 +/-    1.42  0.040 / 0.110