PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-23:27:50
G10     280.1          45.1                9.7 +/-    1.22      13.1 +/-    1.22  0.090 / 0.120
G15     51.7           43.0                7.9 +/-    1.02      11.0 +/-    1.02  0.080 / 0.110
G20     279.2          37.8                5.7 +/-    0.52       8.6 +/-    0.52  0.040 / 0.040
G21     36.1           77.1                9.2 +/-    0.47       9.4 +/-    0.47  0.030 / 0.040
G24     108.7          20.6               10.9 +/-    2.17      23.7 +/-    2.17  0.120 / 0.220
G27     312.3          26.8                8.9 +/-    1.36      16.7 +/-    1.36  0.120 / 0.210
G29     169.0          20.8               11.7 +/-    2.40      25.1 +/-    2.40  0.040 / 0.040
G32     205.9          21.2               12.3 +/-    2.25      26.2 +/-    2.25  0.040 / 0.050