PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-19:12:30
G10     254.9          31.8               12.9 +/-    2.12      21.9 +/-    2.12  0.040 / 0.050
G13     49.0           25.8               11.0 +/-    0.77      21.1 +/-    0.77  0.040 / 0.050
G15     76.9           56.2               11.5 +/-    0.61      13.6 +/-    0.61  0.070 / 0.190
G16     290.5          15.5                8.7 +/-    2.17      21.4 +/-    2.17  0.070 / 0.200
G20     278.3          54.8               13.9 +/-    0.92      16.6 +/-    0.92  0.160 / 0.740
G21     339.6          62.8               11.8 +/-    0.45      13.1 +/-    0.45  0.160 / 0.610
G26     263.7          13.6               11.1 +/-    1.91      28.7 +/-    1.91  0.030 / 0.050
G29     165.0          45.5               13.4 +/-    0.81      17.9 +/-    0.81  0.030 / 0.040