PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-21:58:10
G02     45.1           46.1               11.5 +/-    0.54      15.3 +/-    0.54  0.050 / 0.060
G05     103.0          70.8               14.7 +/-    0.60      15.5 +/-    0.60  0.050 / 0.050
G12     187.4          47.5               16.2 +/-    1.40      21.1 +/-    1.40  0.030 / 0.050
G20     200.8          45.4               14.3 +/-    0.46      19.1 +/-    0.46  0.030 / 0.050
G25     254.7          59.6               14.9 +/-    1.16      17.0 +/-    1.16  0.040 / 0.050
G29     319.6          42.8               13.3 +/-    1.06      18.5 +/-    1.06  0.030 / 0.040