PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-07:12:30
G02     38.2           51.1                3.0 +/-    1.31       3.7 +/-    1.31  0.030 / 0.030
G05     129.7          64.9                5.2 +/-    0.41       5.7 +/-    0.41  0.040 / 0.030
G06     55.0           15.5                1.6 +/-    2.79       3.9 +/-    2.79  0.270 / 0.260
G12     198.9          65.3                4.2 +/-    0.76       4.5 +/-    0.76  0.120 / 0.240
G20     201.2          24.6                5.3 +/-    2.56      10.6 +/-    2.56  0.110 / 0.250
G25     292.9          54.7                5.1 +/-    1.59       6.1 +/-    1.59  0.150 / 0.130
G29     310.3          31.5                2.4 +/-    1.68       4.1 +/-    1.68  0.030 / 0.040