PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-21:12:30
G02     204.0          38.2               19.0 +/-    2.57      28.5 +/-    2.57  0.050 / 0.130
G06     159.2          71.0               18.3 +/-    1.23      19.3 +/-    1.23  0.050 / 0.160
G12     308.0          15.4                9.6 +/-    3.56      23.6 +/-    3.56  0.070 / 0.100
G17     38.6           46.9               14.0 +/-    0.61      18.4 +/-    0.61  0.070 / 0.110
G19     8.5            63.1               13.6 +/-    0.63      15.1 +/-    0.63  0.130 / 0.420
G24     293.5          39.8               13.8 +/-    0.86      20.2 +/-    0.86  0.120 / 0.380
G28     103.0          33.3               16.0 +/-    1.13      26.2 +/-    1.13  0.070 / 0.090