PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-20:57:40
G10     246.3          24.7               12.2 +/-    1.10      23.9 +/-    1.10  0.040 / 0.060
G13     57.8           31.3                8.2 +/-    1.22      13.9 +/-    1.22  0.040 / 0.050
G15     97.9           58.1               10.4 +/-    1.03      12.1 +/-    1.03  0.070 / 0.120
G16     300.6          15.6                7.2 +/-    1.86      17.7 +/-    1.86  0.060 / 0.110
G20     264.0          47.8               10.7 +/-    3.28      13.9 +/-    3.28  0.030 / 0.040
G21     327.4          55.8                9.5 +/-    0.88      11.2 +/-    0.88  0.040 / 0.040
G26     273.0          17.3               10.5 +/-    3.63      24.6 +/-    3.63  0.220 / 0.230
G29     161.7          56.1               10.2 +/-    0.67      12.0 +/-    0.67  0.170 / 0.190