PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-18:58:00
G02     57.2           35.1               24.1 +/-    2.31      38.2 +/-    2.31  0.060 / 0.040
G05     68.4           67.7               26.0 +/-    0.54      27.9 +/-    0.54  0.060 / 0.030
G12     185.9          35.3               29.7 +/-    1.42      46.9 +/-    1.42  0.040 / 0.060
G13     131.9          13.3               33.4 +/-    1.59      86.5 +/-    1.59  0.050 / 0.080
G20     206.1          57.8               28.4 +/-    0.61      32.9 +/-    0.61  0.070 / 0.080
G21     269.4          16.8               26.2 +/-    2.44      62.3 +/-    2.44  0.050 / 0.100
G25     235.0          53.0               28.1 +/-    3.67      34.2 +/-    3.67  0.030 / 0.020
G29     329.6          55.8               24.6 +/-    0.68      29.1 +/-    0.68  0.030 / 0.020