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                9.0 +/-    1.41      16.4 +/-    1.41  0.050 / 0.060
G13     53.6           29.1                8.4 +/-    1.81      15.0 +/-    1.81  0.050 / 0.070
G15     88.0           57.8               10.7 +/-    0.87      12.4 +/-    0.87  0.120 / 0.150
G16     296.0          15.9                7.9 +/-    1.61      19.1 +/-    1.61  0.090 / 0.160
G20     270.2          51.3               10.1 +/-    3.43      12.5 +/-    3.43  0.030 / 0.040
G21     332.5          58.9                9.0 +/-    0.74      10.4 +/-    0.74  0.030 / 0.040
G26     268.8          15.8                8.2 +/-    1.71      20.0 +/-    1.71  0.170 / 0.480
G29     163.5          51.7               11.3 +/-    0.91      14.0 +/-    0.91  0.150 / 0.460