PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-01:12:50
G08     271.5          17.9                7.3 +/-    1.50      16.9 +/-    1.50  0.190 / 0.400
G10     63.7           56.8                7.8 +/-    0.57       9.1 +/-    0.57  0.190 / 0.420
G14     264.5          65.2                7.8 +/-    1.22       8.5 +/-    1.22  0.040 / 0.050
G18     312.3          32.7                5.8 +/-    1.48       9.7 +/-    1.48  0.040 / 0.050
G20     96.1           36.0                6.8 +/-    0.68      10.7 +/-    0.68  0.070 / 0.120
G21     155.4          16.0                8.8 +/-    3.16      21.3 +/-    3.16  0.070 / 0.130
G24     40.1           10.3                5.9 +/-    1.56      16.5 +/-    1.56  0.130 / 0.200
G27     231.8          16.2               10.2 +/-    2.08      24.6 +/-    2.08  0.160 / 0.220
G31     176.9          31.8               10.1 +/-    1.10      17.1 +/-    1.10  0.030 / 0.030
G32     338.8          74.3                7.0 +/-    0.28       7.3 +/-    0.28  0.030 / 0.030