PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-22:12:30
G02     199.9          20.9               21.2 +/-    1.73      45.6 +/-    1.73  0.170 / 0.570
G06     173.8          51.0               16.6 +/-    0.92      20.7 +/-    0.92  0.140 / 0.560
G13     226.5          13.5               19.7 +/-    1.82      50.8 +/-    1.82  0.070 / 0.130
G17     22.6           59.4               12.7 +/-    0.70      14.5 +/-    0.70  0.080 / 0.120
G19     322.0          71.3               12.9 +/-    0.81      13.6 +/-    0.81  0.120 / 0.410
G24     309.4          30.3               11.2 +/-    1.45      19.5 +/-    1.45  0.090 / 0.340
G28     84.3           43.4               14.0 +/-    0.61      19.3 +/-    0.61  0.030 / 0.030
G30     156.6          13.5               20.5 +/-    2.35      53.0 +/-    2.35  0.040 / 0.040