PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/17-15:13:10
G10     249.4          27.7               19.3 +/-    1.29      35.6 +/-    1.29  0.030 / 0.040
G13     54.2           29.3                6.5 +/-    1.89      11.5 +/-    1.89  0.030 / 0.050
G15     84.7           56.4                7.9 +/-    0.95       9.3 +/-    0.95  0.040 / 0.050
G20     270.6          52.3                9.1 +/-    2.40      11.2 +/-    2.40  0.040 / 0.050
G21     333.2          59.1                6.5 +/-    0.76       7.5 +/-    0.76  0.090 / 0.100
G26     269.8          16.0                8.0 +/-    2.12      19.5 +/-    2.12  0.110 / 0.110
G29     163.4          53.0                8.8 +/-    0.87      10.7 +/-    0.87  0.110 / 0.150