PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/31-21:28:00
G02     250.0          77.7                8.7 +/-    0.71       8.9 +/-    0.71  0.100 / 0.280
G05     170.2          18.5               12.9 +/-    2.14      29.5 +/-    2.14  0.090 / 0.270
G06     39.7           57.5                9.5 +/-    0.57      11.1 +/-    0.57  0.100 / 0.130
G12     320.8          51.5                9.0 +/-    1.35      11.2 +/-    1.35  0.100 / 0.140
G17     72.0           21.5                8.0 +/-    1.57      17.0 +/-    1.57  0.050 / 0.060
G19     59.4           36.4                8.4 +/-    0.63      13.0 +/-    0.63  0.050 / 0.070
G24     242.5          33.3               11.8 +/-    0.75      19.4 +/-    0.75  0.030 / 0.040
G25     316.7          13.9                8.9 +/-    2.29      22.8 +/-    2.29  0.030 / 0.040