PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/31-15:58:10
G10     240.7          19.6               10.2 +/-    2.98      22.7 +/-    2.98  0.050 / 0.070
G13     65.9           33.9                8.3 +/-    1.14      13.4 +/-    1.14  0.060 / 0.060
G15     108.4          55.9                9.2 +/-    0.68      10.9 +/-    0.68  0.070 / 0.120
G20     256.5          44.4               11.5 +/-    4.11      15.6 +/-    4.11  0.050 / 0.090
G21     320.5          51.3                8.7 +/-    0.73      10.7 +/-    0.73  0.030 / 0.030
G26     280.5          19.1                5.5 +/-    1.60      12.4 +/-    1.60  0.030 / 0.030
G29     158.6          65.6               11.0 +/-    0.58      11.9 +/-    0.58  0.040 / 0.040