PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-21:12:40
G10     309.4          55.9                8.5 +/-    0.70      10.0 +/-    0.70  0.070 / 0.080
G14     212.0          15.2               18.0 +/-    3.51      44.6 +/-    3.51  0.070 / 0.070
G15     45.6           22.6                7.4 +/-    0.83      15.3 +/-    0.83  0.040 / 0.050
G20     10.4           64.2               10.0 +/-    0.46      11.0 +/-    0.46  0.030 / 0.050
G21     112.3          70.5               12.9 +/-    0.83      13.6 +/-    0.83  0.200 / 0.740
G24     92.2           28.9               11.1 +/-    0.67      19.8 +/-    0.67  0.210 / 0.430
G27     293.7          36.7               10.9 +/-    1.08      16.7 +/-    1.08  0.060 / 0.140
G32     212.9          38.7               14.0 +/-    0.58      20.8 +/-    0.58  0.060 / 0.150