PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/07-20:13:00
G10     283.5          46.8               20.5 +/-    1.37      26.9 +/-    1.37  0.070 / 0.110
G15     50.4           41.3               18.4 +/-    0.41      26.2 +/-    0.41  0.070 / 0.110
G20     327.7          64.7               18.7 +/-    0.69      20.5 +/-    0.69  0.040 / 0.050
G21     56.0           77.0               19.8 +/-    0.71      20.3 +/-    0.71  0.040 / 0.050
G24     104.9          22.0               24.2 +/-    1.26      50.8 +/-    1.26  0.090 / 0.180
G27     311.0          27.7               17.7 +/-    0.52      32.6 +/-    0.52  0.090 / 0.190
G29     168.5          17.3               25.8 +/-    2.80      60.7 +/-    2.80  0.040 / 0.060
G32     206.8          22.8               28.4 +/-    1.93      58.5 +/-    1.93  0.030 / 0.060