PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/05-18:27:50
G02     31.3           57.3               16.5 +/-    0.72      19.2 +/-    0.72  0.040 / 0.040
G05     150.8          59.3               19.3 +/-    0.65      22.0 +/-    0.65  0.050 / 0.050
G06     53.6           16.8               13.3 +/-    2.38      31.6 +/-    2.38  0.030 / 0.030
G12     200.3          68.2               16.5 +/-    0.27      17.7 +/-    0.27  0.030 / 0.040
G20     198.0          26.4               21.8 +/-    2.63      41.2 +/-    2.63  0.030 / 0.040
G25     293.7          56.2               16.7 +/-    2.08      19.6 +/-    2.08  0.030 / 0.040
G29     308.6          30.4               16.3 +/-    1.27      28.3 +/-    1.27  0.210 / 0.240