PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-16:28:10
G02     55.9           35.7               11.4 +/-    0.57      17.8 +/-    0.57  0.020 / 0.040
G05     71.3           67.6               12.8 +/-    0.32      13.8 +/-    0.32  0.030 / 0.040
G12     187.1          38.7               14.9 +/-    1.62      22.2 +/-    1.62  0.090 / 0.070
G13     133.6          11.6               18.6 +/-    3.27      50.0 +/-    3.27  0.090 / 0.090
G20     205.5          53.9               14.7 +/-    0.55      17.7 +/-    0.55  0.040 / 0.060
G21     267.9          16.4               14.3 +/-    2.82      34.3 +/-    2.82  0.040 / 0.070
G25     241.7          54.9               13.7 +/-    0.68      16.3 +/-    0.68  0.170 / 0.470
G29     329.5          55.1               10.7 +/-    1.51      12.8 +/-    1.51  0.190 / 0.460