PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-19:12:30
G10     249.9          27.9                9.2 +/-    0.86      16.9 +/-    0.86  0.050 / 0.060
G13     53.6           29.1                8.3 +/-    0.81      14.8 +/-    0.81  0.040 / 0.060
G15     88.0           57.8               10.7 +/-    0.48      12.4 +/-    0.48  0.070 / 0.180
G16     296.0          15.9                7.3 +/-    6.13      17.7 +/-    6.13  0.060 / 0.150
G20     270.2          51.3               11.2 +/-    0.91      13.9 +/-    0.91  0.210 / 0.710
G21     332.5          58.9                9.2 +/-    0.86      10.5 +/-    0.86  0.240 / 0.640
G26     268.8          15.8               10.6 +/-    3.11      26.0 +/-    3.11  0.030 / 0.050
G29     163.5          51.7               10.3 +/-    2.02      12.8 +/-    2.02  0.040 / 0.050