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               12.8 +/-    1.36      21.7 +/-    1.36  0.050 / 0.040
G13     49.0           25.8               10.8 +/-    1.94      20.7 +/-    1.94  0.060 / 0.050
G15     76.9           56.2               11.3 +/-    0.85      13.3 +/-    0.85  0.150 / 0.190
G16     290.5          15.5                8.7 +/-    2.60      21.4 +/-    2.60  0.120 / 0.210
G20     278.3          54.8               12.2 +/-    3.15      14.6 +/-    3.15  0.030 / 0.040
G21     339.6          62.8               13.0 +/-    0.86      14.4 +/-    0.86  0.030 / 0.050
G26     263.7          13.6                9.1 +/-    2.97      23.4 +/-    2.97  0.140 / 0.400
G29     165.0          45.5               12.2 +/-    1.18      16.3 +/-    1.18  0.150 / 0.300