PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-19:28:00
G10     261.5          36.3               14.1 +/-    1.25      21.8 +/-    1.25  0.050 / 0.040
G13     44.4           21.3               10.1 +/-    2.36      21.5 +/-    2.36  0.050 / 0.040
G15     66.0           52.7               12.1 +/-    1.04      14.8 +/-    1.04  0.090 / 0.250
G16     283.9          14.3                9.6 +/-    1.23      24.3 +/-    1.23  0.170 / 0.290
G20     289.4          58.4               13.1 +/-    1.29      15.0 +/-    1.29  0.030 / 0.050
G21     350.0          67.5               13.3 +/-    0.36      14.3 +/-    0.36  0.030 / 0.040
G24     126.7          10.7               12.7 +/-   22.71      34.8 +/-   22.71  0.100 / 0.250
G27     321.0          14.1                8.7 +/-    1.88      22.0 +/-    1.88  0.110 / 0.220
G29     166.5          38.1               13.4 +/-    1.38      20.1 +/-    1.38  0.130 / 0.300