PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-13:12:40
G01     225.8          17.3                4.9 +/-    1.69      11.5 +/-    1.69  0.110 / 0.150
G03     277.1          71.9                8.8 +/-    0.94       9.2 +/-    0.94  0.120 / 0.220
G14     86.3           23.8                8.2 +/-    1.45      16.6 +/-    1.45  0.040 / 0.030
G16     150.8          42.5                8.7 +/-    1.39      12.2 +/-    1.39  0.040 / 0.030
G22     204.6          68.7               10.4 +/-    0.43      11.0 +/-    0.43  0.030 / 0.030
G23     307.3          37.4                6.9 +/-    1.35      10.4 +/-    1.35  0.030 / 0.030
G26     102.5          54.7                8.2 +/-    0.63       9.8 +/-    0.63  0.060 / 0.070
G31     45.2           33.0                6.3 +/-    1.30      10.4 +/-    1.30  0.050 / 0.070
G32     97.3           10.1                7.8 +/-    1.93      21.6 +/-    1.93  0.130 / 0.190