PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-20:12:50
G02     82.3           15.0               12.0 +/-    1.35      30.0 +/-    1.35  0.120 / 0.410
G05     44.4           38.6               12.9 +/-    0.59      19.3 +/-    0.59  0.130 / 0.420
G13     102.9          33.0               16.7 +/-    0.49      27.5 +/-    0.49  0.070 / 0.170
G15     146.5          36.3               18.0 +/-    0.76      27.9 +/-    0.76  0.080 / 0.200
G18     230.3          25.9               15.3 +/-    1.97      29.3 +/-    1.97  0.060 / 0.130
G20     338.6          84.8               14.3 +/-    0.66      14.3 +/-    0.66  0.060 / 0.120
G21     295.8          35.7               15.0 +/-    1.29      23.4 +/-    1.29  0.030 / 0.070
G25     207.0          25.4               15.4 +/-    1.77      29.9 +/-    1.77  0.030 / 0.070
G26     309.8          16.0               13.1 +/-    1.91      31.9 +/-    1.91  0.030 / 0.040
G29     53.6           85.9               13.5 +/-    0.75      13.5 +/-    0.75  0.050 / 0.040