PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-22:27:40
G02     205.5          42.9               15.6 +/-    0.63      21.7 +/-    0.63  0.150 / 0.180
G06     152.6          74.9               14.3 +/-    0.60      14.7 +/-    0.60  0.080 / 0.170
G12     310.2          18.6               10.3 +/-    3.14      23.3 +/-    3.14  0.060 / 0.100
G17     42.8           43.3               11.3 +/-    1.65      15.6 +/-    1.65  0.070 / 0.100
G19     15.7           60.5               12.1 +/-    0.96      13.7 +/-    0.96  0.060 / 0.120
G24     287.8          41.5               13.8 +/-    5.42      19.6 +/-    5.42  0.070 / 0.130
G28     107.2          30.1               13.6 +/-    1.09      23.7 +/-    1.09  0.030 / 0.030