PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/17-22:12:40
G10     267.9          40.0               10.9 +/-    1.42      15.8 +/-    1.42  0.200 / 0.530
G13     41.3           16.9                7.4 +/-    2.38      17.5 +/-    2.38  0.200 / 0.490
G15     58.8           48.8                8.6 +/-    1.04      11.0 +/-    1.04  0.070 / 0.040
G16     278.6          12.4                9.6 +/-    2.69      25.4 +/-    2.69  0.060 / 0.040
G20     299.2          60.5                7.7 +/-    0.41       8.7 +/-    0.41  0.280 / 0.270
G21     2.0            71.5                9.3 +/-    0.70       9.7 +/-    0.70  0.170 / 0.280
G24     121.3          14.4               10.4 +/-    1.97      26.3 +/-    1.97  0.030 / 0.040
G27     318.8          18.7                7.6 +/-    2.42      17.2 +/-    2.42  0.030 / 0.050
G29     167.1          30.9                9.8 +/-    1.45      16.9 +/-    1.45  0.140 / 0.200