PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-11:57:50
G02     202.0          25.5                3.8 +/-    1.31       7.3 +/-    1.31  0.080 / 0.100
G06     164.4          61.9                7.2 +/-    0.97       8.1 +/-    0.97  0.070 / 0.110
G12     303.0          10.8               -4.9 +/-   14.89     -13.5 +/-   14.89  0.030 / 0.040
G17     26.6           56.2                3.7 +/-    0.69       4.4 +/-    0.69  0.030 / 0.040
G19     349.0          68.7                3.7 +/-    0.44       3.9 +/-    0.44  0.110 / 0.360
G24     305.5          32.9                4.0 +/-    1.78       6.6 +/-    1.78  0.100 / 0.340
G28     90.5           41.9                5.7 +/-    0.69       8.1 +/-    0.69  0.040 / 0.040