PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-17:42:30
G02     30.0           58.3               16.5 +/-    0.79      19.0 +/-    0.79  0.060 / 0.050
G05     151.8          57.9               19.8 +/-    0.59      22.9 +/-    0.59  0.040 / 0.050
G06     52.5           18.5               11.9 +/-    2.93      27.2 +/-    2.93  0.020 / 0.030
G12     203.8          70.3               15.9 +/-    0.94      16.8 +/-    0.94  0.030 / 0.030
G19     99.1           9.6                16.1 +/-    2.17      45.2 +/-    2.17  0.040 / 0.040
G20     197.9          24.4               19.1 +/-    3.59      37.8 +/-    3.59  0.030 / 0.050
G25     297.1          54.8               15.5 +/-    3.17      18.6 +/-    3.17  0.060 / 0.120
G29     307.5          29.5               13.8 +/-    1.16      24.4 +/-    1.16  0.080 / 0.090