PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-17:27:50
G02     41.0           49.0               14.8 +/-    0.92      18.9 +/-    0.92  0.050 / 0.040
G05     129.9          68.0               24.6 +/-    0.63      26.3 +/-    0.63  0.040 / 0.040
G06     58.9           10.4               15.1 +/-    1.40      41.9 +/-    1.40  0.030 / 0.040
G12     192.7          57.8               16.2 +/-    0.67      18.8 +/-    0.67  0.030 / 0.040
G20     199.8          35.9               19.2 +/-    1.64      30.0 +/-    1.64  0.080 / 0.130
G25     276.0          59.3               12.6 +/-    1.60      14.4 +/-    1.60  0.100 / 0.100
G29     316.0          38.8               18.2 +/-    0.98      26.9 +/-    0.98  0.030 / 0.030