PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-20:58:10
G05     52.1           10.2                8.5 +/-    2.55      23.6 +/-    2.55  0.050 / 0.050
G10     242.4          21.0               12.0 +/-    2.70      25.8 +/-    2.70  0.050 / 0.050
G13     63.3           33.3                8.9 +/-    1.16      14.6 +/-    1.16  0.070 / 0.110
G15     108.3          57.1               11.4 +/-    0.53      13.3 +/-    0.53  0.070 / 0.140
G16     305.6          15.0                7.5 +/-    2.02      18.8 +/-    2.02  0.030 / 0.030
G20     258.0          44.2               10.8 +/-    3.21      14.8 +/-    3.21  0.030 / 0.040
G21     322.1          52.4                9.9 +/-    0.40      12.1 +/-    0.40  0.130 / 0.350
G26     278.1          18.7                9.1 +/-    1.58      20.8 +/-    1.58  0.090 / 0.330
G29     159.4          61.8               10.9 +/-    0.38      12.1 +/-    0.38  0.090 / 0.210