PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-14:27:50
G03     208.8          60.1               11.0 +/-    0.81      12.5 +/-    0.81  0.040 / 0.080
G07     255.3          17.8                6.5 +/-    1.42      15.1 +/-    1.42  0.050 / 0.070
G09     307.5          23.4                6.9 +/-    1.12      14.0 +/-    1.12  0.120 / 0.280
G16     116.9          63.4               11.9 +/-    0.63      13.1 +/-    0.63  0.120 / 0.290
G22     186.2          42.9               10.6 +/-    2.82      14.8 +/-    2.82  0.040 / 0.060
G23     326.1          56.1                8.1 +/-    0.69       9.6 +/-    0.69  0.040 / 0.060
G26     60.5           48.9                9.5 +/-    0.54      12.1 +/-    0.54  0.040 / 0.040
G31     56.6           13.9                8.3 +/-    1.60      21.1 +/-    1.60  0.040 / 0.050