PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/05-18:57:50
G02     43.4           47.1               16.2 +/-    0.38      21.3 +/-    0.38  0.040 / 0.070
G05     123.4          70.0               19.4 +/-    0.49      20.5 +/-    0.49  0.040 / 0.050
G12     190.2          53.2               18.3 +/-    1.38      22.2 +/-    1.38  0.040 / 0.050
G20     200.3          40.2               21.9 +/-    1.02      31.7 +/-    1.02  0.030 / 0.060
G25     266.2          60.0               18.4 +/-    0.93      20.8 +/-    0.93  0.060 / 0.110
G29     317.9          40.9               17.4 +/-    1.30      24.9 +/-    1.30  0.050 / 0.110