PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-19:27:50
G10     256.0          32.6               10.8 +/-    1.71      17.9 +/-    1.71  0.060 / 0.050
G13     48.1           25.1                8.8 +/-    0.99      17.2 +/-    0.99  0.060 / 0.060
G15     75.0           55.8               10.0 +/-    0.50      11.8 +/-    0.50  0.070 / 0.220
G20     280.1          55.4               11.5 +/-    1.03      13.6 +/-    1.03  0.070 / 0.210
G21     341.2          63.6                9.2 +/-    0.55      10.2 +/-    0.55  0.030 / 0.050
G26     262.6          13.0                9.0 +/-    1.09      23.5 +/-    1.09  0.040 / 0.050
G29     165.3          44.1               12.0 +/-    0.82      16.4 +/-    0.82  0.200 / 0.290