PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-18:58:10
G02     3.5            72.7                7.3 +/-    0.78       7.6 +/-    0.78  0.030 / 0.030
G05     160.0          42.1               10.0 +/-    0.63      14.0 +/-    0.63  0.030 / 0.040
G06     43.9           32.1                8.3 +/-    0.81      13.9 +/-    0.81  0.060 / 0.120
G12     290.9          77.3                7.9 +/-    1.11       8.1 +/-    1.11  0.080 / 0.110
G19     83.0           20.6                7.6 +/-    1.62      16.5 +/-    1.62  0.100 / 0.190
G24     222.5          16.8               10.2 +/-    2.45      24.4 +/-    2.45  0.080 / 0.180
G25     314.9          35.8                6.6 +/-    0.94      10.3 +/-    0.94  0.040 / 0.040
G29     292.3          14.6                8.7 +/-    1.33      21.9 +/-    1.33  0.030 / 0.040