PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/09-21:57:40
G02     43.5           46.6                6.7 +/-    0.50       8.8 +/-    0.50  0.030 / 0.040
G05     105.0          69.2                7.9 +/-    0.61       8.4 +/-    0.61  0.030 / 0.030
G12     186.5          51.1               10.3 +/-    2.30      12.8 +/-    2.30  0.040 / 0.060
G25     272.6          58.5                9.6 +/-    0.58      11.0 +/-    0.58  0.050 / 0.050
G29     315.5          36.8                8.3 +/-    1.44      12.7 +/-    1.44  0.060 / 0.070