PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-23:27:20
G02     206.0          44.3               12.4 +/-    1.64      16.8 +/-    1.64  0.050 / 0.070
G06     152.0          75.6               10.6 +/-    0.91      10.9 +/-    0.91  0.050 / 0.060
G12     310.8          19.6                7.2 +/-    1.34      16.1 +/-    1.34  0.090 / 0.110
G17     44.2           42.1                8.1 +/-    1.56      11.4 +/-    1.56  0.100 / 0.100
G19     17.3           59.8                9.8 +/-    1.06      11.2 +/-    1.06  0.070 / 0.170
G24     285.9          42.0               14.2 +/-    1.94      20.1 +/-    1.94  0.100 / 0.150
G28     108.4          29.1               12.3 +/-    1.19      22.0 +/-    1.19  0.040 / 0.040