PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/31-17:57:30
G10     298.9          53.1               11.2 +/-    1.08      13.6 +/-    1.08  0.070 / 0.090
G15     45.9           26.4                8.1 +/-    0.97      15.4 +/-    0.97  0.060 / 0.080
G20     357.7          65.1               11.7 +/-    1.06      12.7 +/-    1.06  0.040 / 0.040
G21     94.4           74.3               13.0 +/-    0.32      13.5 +/-    0.32  0.030 / 0.040
G24     99.9           26.6               13.2 +/-    0.70      24.9 +/-    0.70  0.050 / 0.110
G27     301.1          34.3               10.7 +/-    1.68      17.2 +/-    1.68  0.050 / 0.100
G32     209.6          32.8               11.8 +/-    1.18      19.6 +/-    1.18  0.030 / 0.040