PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/25-15:58:10
G02     54.1           37.1                8.9 +/-    0.36      13.5 +/-    0.36  0.130 / 0.300
G05     77.1           68.7               10.8 +/-    0.47      11.6 +/-    0.47  0.140 / 0.300
G12     187.8          41.5               12.1 +/-    1.67      17.2 +/-    1.67  0.030 / 0.030
G20     204.6          51.0               13.0 +/-    1.20      16.2 +/-    1.20  0.030 / 0.040
G21     266.1          15.1               11.5 +/-    0.87      28.5 +/-    0.87  0.050 / 0.090
G25     246.4          56.2               13.1 +/-    1.07      15.5 +/-    1.07  0.050 / 0.060
G29     327.9          53.1                7.1 +/-    1.10       8.6 +/-    1.10  0.080 / 0.070