PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-23:28:00
G10     270.6          41.5               10.5 +/-    1.20      14.9 +/-    1.20  0.320 / 0.290
G13     40.3           15.0                7.6 +/-    2.71      19.0 +/-    2.71  0.210 / 0.230
G15     56.1           46.4                9.6 +/-    1.32      12.6 +/-    1.32  0.240 / 0.510
G16     276.8          11.5                7.7 +/-    8.91      20.8 +/-    8.91  0.310 / 0.500
G20     303.1          61.2               10.0 +/-    1.03      11.3 +/-    1.03  0.040 / 0.040
G21     8.4            73.0               10.1 +/-    0.67      10.5 +/-    0.67  0.040 / 0.040
G24     119.0          15.8               11.1 +/-    3.10      27.1 +/-    3.10  0.130 / 0.430
G27     317.7          20.5                7.9 +/-    1.77      17.1 +/-    1.77  0.110 / 0.470
G29     167.2          28.0               11.8 +/-    1.75      21.5 +/-    1.75  0.040 / 0.050
G32     204.7          10.8              -10.5 +/-   34.63     -28.6 +/-   34.63  0.040 / 0.060