PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/11-20:12:30
G10     259.6          35.0               14.2 +/-    2.46      22.5 +/-    2.46  0.150 / 0.260
G13     45.6           22.6               10.2 +/-    1.12      21.0 +/-    1.12  0.130 / 0.180
G15     69.5           54.3               14.2 +/-    0.30      17.0 +/-    0.30  0.040 / 0.060
G20     285.8          57.2               14.1 +/-    0.94      16.4 +/-    0.94  0.050 / 0.050
G21     346.7          66.2               12.5 +/-    0.86      13.6 +/-    0.86  0.070 / 0.240
G26     259.4          11.4               15.5 +/-    1.89      42.1 +/-    1.89  0.090 / 0.230
G27     321.6          12.5               10.5 +/-    3.73      27.8 +/-    3.73  0.030 / 0.050
G29     166.0          39.9               15.8 +/-    0.50      23.0 +/-    0.50  0.030 / 0.040