PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-11:28:00
G02     35.3           53.9                4.5 +/-    1.26       5.4 +/-    1.26  0.030 / 0.030
G05     139.7          62.1                7.1 +/-    0.40       7.9 +/-    0.40  0.030 / 0.020
G06     52.3           20.8                3.4 +/-    3.24       7.3 +/-    3.24  0.030 / 0.030
G12     203.4          68.7                7.6 +/-    0.40       8.1 +/-    0.40  0.030 / 0.020
G20     199.6          24.1                6.8 +/-    3.66      13.6 +/-    3.66  0.120 / 0.280
G25     296.6          53.7                6.0 +/-    1.83       7.2 +/-    1.83  0.200 / 0.430
G29     309.4          31.5                5.3 +/-    1.94       9.0 +/-    1.94  0.210 / 0.230