PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-20:58:00
G02     345.8794       76.7698          9.9534 +/-  0.6715   10.1962 +/-  0.6715  0.060 / 0.110
G05     164.2829       37.7020         13.0035 +/-  0.9058   19.6595 +/-  0.9058  0.060 / 0.110
G06     43.8903        34.0802          8.5628 +/-  0.7090   13.8256 +/-  0.7090  0.150 / 0.280
G12     290.9357       78.3799          9.3989 +/-  1.1379    9.5750 +/-  1.1379  0.170 / 0.350
G19     82.0401        21.7685          8.1466 +/-  2.7614   17.1736 +/-  2.7614  0.050 / 0.090
G24     225.1948       19.0181         13.8508 +/-  1.9756   31.2176 +/-  1.9756  0.070 / 0.090
G25     314.9270       38.8703         13.0575 +/-  1.7014   19.3509 +/-  1.7014  0.030 / 0.040
G29     291.3079       13.4323         11.3650 +/-  1.8910   29.3515 +/-  1.8910  0.040 / 0.040