PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/09-20:27:30
G02     33.9           55.2               14.1 +/-    0.57      16.8 +/-    0.57  0.050 / 0.050
G05     142.0          63.8               17.6 +/-    0.63      19.4 +/-    0.63  0.040 / 0.060
G06     56.2           13.0                9.7 +/-    1.49      25.2 +/-    1.49  0.060 / 0.100
G12     194.2          62.9               14.6 +/-    0.69      16.2 +/-    0.69  0.050 / 0.100
G20     198.2          31.2               17.0 +/-    1.66      29.1 +/-    1.66  0.030 / 0.050
G25     284.0          59.3               14.1 +/-    0.75      16.2 +/-    0.75  0.030 / 0.050
G29     311.0          32.6               12.2 +/-    1.00      20.2 +/-    1.00  0.030 / 0.040