PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-03:27:40
G02     34.5           54.4                6.8 +/-    0.93       8.2 +/-    0.93  0.030 / 0.030
G05     136.2          62.3                7.9 +/-    0.36       8.7 +/-    0.36  0.030 / 0.040
G06     53.6           16.3                4.8 +/-    2.46      11.5 +/-    2.46  0.030 / 0.030
G12     201.0          68.6                7.7 +/-    0.39       8.2 +/-    0.39  0.030 / 0.030
G19     99.6           10.6                7.0 +/-    1.71      19.2 +/-    1.71  0.310 / 0.200
G25     298.5          52.4                6.9 +/-    2.38       8.5 +/-    2.38  0.180 / 0.240
G29     307.0          27.5                6.8 +/-    2.46      12.6 +/-    2.46  0.050 / 0.050