PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-20:13:10
G01     126.1          12.5               22.2 +/-    5.57      58.5 +/-    5.57  0.050 / 0.050
G07     55.1           69.6               17.5 +/-    0.29      18.5 +/-    0.29  0.060 / 0.050
G08     51.9           42.7               15.3 +/-    0.79      21.4 +/-    0.79  0.290 / 0.470
G09     178.7          35.5               18.9 +/-    0.68      29.7 +/-    0.68  0.270 / 0.410
G11     119.3          35.6               20.5 +/-    1.70      32.3 +/-    1.70  0.030 / 0.040
G13     321.0          12.2               10.7 +/-   14.05      28.4 +/-   14.05  0.030 / 0.040
G17     201.5          12.4               20.8 +/-   30.57      55.1 +/-   30.57  0.170 / 0.380
G18     103.2          17.2               18.5 +/-    2.97      43.6 +/-    2.97  0.140 / 0.280
G28     278.9          53.9               17.8 +/-    2.24      21.5 +/-    2.24  0.030 / 0.030
G30     337.9          63.3               16.1 +/-    1.04      17.8 +/-    1.04  0.030 / 0.030