PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/20-20:42:50
G10     263.0          35.9               10.3 +/-    0.82      16.1 +/-    0.82  0.050 / 0.040
G13     43.8           21.0                8.1 +/-    2.69      17.4 +/-    2.69  0.040 / 0.030
G15     69.2           56.0                8.2 +/-    0.38       9.7 +/-    0.38  0.140 / 0.500
G16     282.1          13.4                6.4 +/-    1.75      16.5 +/-    1.75  0.110 / 0.350
G20     290.3          58.5                7.6 +/-    1.06       8.7 +/-    1.06  0.140 / 0.210
G21     354.6          69.3                8.6 +/-    0.60       9.1 +/-    0.60  0.150 / 0.210
G24     121.1          12.3               11.0 +/-    2.32      29.2 +/-    2.32  0.210 / 0.310
G27     320.6          14.8                7.5 +/-    1.96      18.7 +/-    1.96  0.190 / 0.340
G29     167.5          35.8                9.2 +/-    0.85      14.4 +/-    0.85  0.090 / 0.270