PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-00:57:40
G01     222.3          15.1                9.3 +/-    3.75      23.1 +/-    3.75  0.040 / 0.030
G03     284.3          68.2                7.7 +/-    0.30       8.2 +/-    0.30  0.050 / 0.040
G09     295.8          10.9              -12.5 +/-   24.62     -34.1 +/-   24.62  0.090 / 0.150
G14     86.5           26.0                5.4 +/-    2.07      10.3 +/-    2.07  0.110 / 0.170
G16     141.5          47.4                8.5 +/-    1.27      11.0 +/-    1.27  0.170 / 0.200
G22     216.9          68.9                7.7 +/-    0.82       8.2 +/-    0.82  0.200 / 0.270
G23     309.5          39.6                7.2 +/-    1.53      10.5 +/-    1.53  0.030 / 0.030
G26     92.3           54.2                6.6 +/-    0.91       7.9 +/-    0.91  0.030 / 0.030
G31     46.7           29.2                4.9 +/-    1.82       8.7 +/-    1.82  0.180 / 0.330