PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/29-17:42:30
G02     52.6           38.7               17.2 +/-    0.88      25.6 +/-    0.88  0.060 / 0.040
G05     83.3           70.2               17.6 +/-    0.53      18.6 +/-    0.53  0.050 / 0.040
G12     187.6          42.2               15.3 +/-    0.69      21.5 +/-    0.69  0.060 / 0.060
G20     203.7          50.7               15.9 +/-    1.07      19.9 +/-    1.07  0.050 / 0.060
G21     264.9          13.5               13.4 +/-    5.92      34.5 +/-    5.92  0.250 / 0.370
G25     246.5          56.8               14.2 +/-    1.73      16.6 +/-    1.73  0.150 / 0.230
G29     325.9          50.9               15.4 +/-    0.96      19.3 +/-    0.96  0.040 / 0.050