PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-21:42:50
G02     210.2          52.4               18.5 +/-    0.83      22.6 +/-    0.83  0.070 / 0.180
G06     103.3          80.3               15.0 +/-    0.62      15.2 +/-    0.62  0.110 / 0.170
G12     314.4          26.4               11.9 +/-    1.10      22.5 +/-    1.10  0.060 / 0.070
G17     50.3           37.5               13.2 +/-    0.83      20.0 +/-    0.83  0.060 / 0.080
G19     29.7           54.1               13.7 +/-    0.98      16.4 +/-    0.98  0.040 / 0.050
G24     275.5          42.5               14.2 +/-    2.14      19.8 +/-    2.14  0.040 / 0.050
G28     115.1          23.9               16.4 +/-    1.09      32.8 +/-    1.09  0.090 / 0.190