PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-18:12:40
G01     232.2          22.4               12.3 +/-    3.28      25.5 +/-    3.28  0.060 / 0.100
G03     298.8          65.4                8.4 +/-    0.94       9.1 +/-    0.94  0.060 / 0.100
G14     79.1           30.1                9.5 +/-    1.39      16.6 +/-    1.39  0.040 / 0.070
G16     153.1          37.3               13.6 +/-    1.49      20.7 +/-    1.49  0.040 / 0.080
G22     235.0          75.3               10.2 +/-    0.50      10.5 +/-    0.50  0.030 / 0.030
G23     302.4          33.3                9.5 +/-    1.15      15.5 +/-    1.15  0.030 / 0.040
G26     110.1          51.8               11.0 +/-    0.50      13.6 +/-    0.50  0.090 / 0.160
G31     42.8           38.3                6.5 +/-    0.66       9.7 +/-    0.66  0.090 / 0.150