PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-03:12:30
G02     35.0           54.0                5.4 +/-    1.08       6.6 +/-    1.08  0.040 / 0.010
G05     135.0          62.8                7.0 +/-    0.42       7.8 +/-    0.42  0.040 / 0.010
G06     53.9           15.8                3.4 +/-    3.67       8.4 +/-    3.67  0.030 / 0.010
G12     199.9          67.9                6.1 +/-    0.45       6.5 +/-    0.45  0.030 / 0.010
G19     100.0          10.3                5.6 +/-    2.19      15.5 +/-    2.19  0.270 / 0.210
G25     297.6          52.8                7.3 +/-    3.07       8.9 +/-    3.07  0.270 / 0.110
G29     307.4          27.9                5.4 +/-    1.44       9.8 +/-    1.44  0.040 / 0.040