PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/10-18:57:40
G02     51.1           40.3               15.0 +/-    0.67      21.7 +/-    0.67  0.280 / 0.590
G05     90.4           71.3               14.8 +/-    0.50      15.6 +/-    0.50  0.290 / 0.530
G12     187.5          43.1               16.2 +/-    1.29      22.4 +/-    1.29  0.060 / 0.060
G20     203.0          49.9               18.8 +/-    1.47      23.8 +/-    1.47  0.050 / 0.080
G21     263.7          12.2               14.2 +/-    1.71      37.7 +/-    1.71  0.060 / 0.060
G25     247.2          57.4               16.1 +/-    0.66      18.8 +/-    0.66  0.060 / 0.060
G29     324.4          48.9               15.8 +/-    1.09      20.2 +/-    1.09  0.050 / 0.070