PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-21:57:30
G10     266.6          39.3               10.9 +/-    1.42      16.0 +/-    1.42  0.040 / 0.050
G13     41.8           17.8                7.6 +/-    0.78      17.6 +/-    0.78  0.040 / 0.050
G15     60.2           49.8               10.4 +/-    0.59      13.2 +/-    0.59  0.090 / 0.130
G20     296.9          60.1                9.0 +/-    0.45      10.2 +/-    0.45  0.100 / 0.140
G21     359.2          70.7                9.6 +/-    0.57      10.2 +/-    0.57  0.110 / 0.390
G24     122.3          13.6               11.8 +/-    2.14      30.3 +/-    2.14  0.140 / 0.300
G27     319.3          17.8                7.6 +/-    0.73      17.6 +/-    0.73  0.090 / 0.260
G29     167.0          32.3               12.5 +/-    1.48      20.8 +/-    1.48  0.090 / 0.270