PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-13:43:00
G02     239.0          73.5                4.7 +/-    0.66       4.9 +/-    0.66  0.080 / 0.270
G05     173.6          13.9                4.3 +/-    1.69      11.1 +/-    1.69  0.130 / 0.330
G06     40.7           58.0                5.0 +/-    0.82       5.7 +/-    0.82  0.070 / 0.110
G12     321.5          52.0                5.6 +/-    1.70       6.8 +/-    1.70  0.070 / 0.080
G17     68.8           24.3                4.9 +/-    0.67       9.8 +/-    0.67  0.050 / 0.100
G19     57.2           37.3                4.2 +/-    0.68       6.4 +/-    0.68  0.050 / 0.110
G24     247.6          35.0                5.4 +/-    1.66       8.6 +/-    1.66  0.030 / 0.050
G25     316.0          10.6              -14.4 +/-   27.38     -39.5 +/-   27.38  0.060 / 0.060