PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-21:43:00
G01     126.4          12.2               22.6 +/-    4.16      59.9 +/-    4.16  0.270 / 0.370
G07     53.9           69.6               16.9 +/-    0.29      17.9 +/-    0.29  0.220 / 0.340
G08     51.9           42.3               14.0 +/-    0.96      19.6 +/-    0.96  0.040 / 0.050
G09     178.9          36.1               18.7 +/-    0.97      29.0 +/-    0.97  0.030 / 0.040
G11     120.6          35.2               19.0 +/-    0.56      30.0 +/-    0.56  0.100 / 0.090
G13     321.2          11.7               10.2 +/-   19.18      27.3 +/-   19.18  0.110 / 0.100
G17     201.1          13.1               29.1 +/-    2.17      75.8 +/-    2.17  0.150 / 0.260
G28     278.3          53.7               16.9 +/-    2.37      20.4 +/-    2.37  0.090 / 0.410
G30     338.9          63.6               15.8 +/-    0.35      17.5 +/-    0.35  0.060 / 0.100