PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-15:28:00
G01     226.0          17.4                8.1 +/-    2.19      18.9 +/-    2.19  0.090 / 0.170
G03     280.9          70.7                8.6 +/-    1.03       9.0 +/-    1.03  0.110 / 0.210
G14     86.4           23.6                7.5 +/-    1.03      15.2 +/-    1.03  0.110 / 0.180
G16     153.0          41.5                9.8 +/-    1.21      13.9 +/-    1.21  0.110 / 0.190
G22     206.5          69.1                8.7 +/-    0.51       9.2 +/-    0.51  0.030 / 0.040
G23     306.6          36.4                7.7 +/-    1.19      11.9 +/-    1.19  0.030 / 0.030
G26     105.2          55.0                8.2 +/-    0.61       9.7 +/-    0.61  0.200 / 0.270
G31     44.7           34.3                6.5 +/-    1.40      10.5 +/-    1.40  0.180 / 0.280
G32     97.4           10.0                8.8 +/-    2.78      24.4 +/-    2.78  0.050 / 0.040