PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-20:13:00
G10     273.7          43.2               10.6 +/-    1.40      14.7 +/-    1.40  0.040 / 0.040
G13     39.3           13.0                7.6 +/-    2.47      20.0 +/-    2.47  0.040 / 0.040
G15     54.2           44.7                9.6 +/-    0.64      12.9 +/-    0.64  0.160 / 0.380
G20     311.0          62.9               10.0 +/-    0.70      11.1 +/-    0.70  0.110 / 0.280
G21     15.8           74.4               10.8 +/-    0.58      11.1 +/-    0.58  0.030 / 0.060
G24     117.5          17.2               11.8 +/-    1.33      27.8 +/-    1.33  0.040 / 0.060
G27     316.3          22.7                7.8 +/-    1.27      16.0 +/-    1.27  0.200 / 0.170
G29     167.8          26.3               10.9 +/-    2.14      20.6 +/-    2.14  0.090 / 0.170
G32     204.7          14.3               14.8 +/-    2.50      37.5 +/-    2.50  0.220 / 0.400