PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/27-14:27:50
G01     49.3           24.7                6.4 +/-    2.35      12.6 +/-    2.35  0.040 / 0.050
G06     176.9          24.9                9.0 +/-    0.91      17.7 +/-    0.91  0.050 / 0.060
G11     44.6           15.8                4.8 +/-    3.12      11.8 +/-    3.12  0.030 / 0.030
G13     249.3          31.2                9.7 +/-    1.45      16.5 +/-    1.45  0.030 / 0.030
G15     283.8          15.6                7.7 +/-    0.79      18.9 +/-    0.79  0.040 / 0.040
G17     294.7          77.9                8.7 +/-    0.25       8.8 +/-    0.25  0.050 / 0.050
G19     246.4          61.4                9.5 +/-    0.96      10.6 +/-    0.96  0.110 / 0.150
G28     43.2           56.7                8.6 +/-    0.63      10.0 +/-    0.63  0.130 / 0.160
G30     149.6          40.8                8.2 +/-    1.46      11.8 +/-    1.46  0.100 / 0.260