PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/15-17:42:50
G02     76.1           19.2               14.0 +/-    1.45      31.5 +/-    1.45  0.040 / 0.050
G05     45.2           45.0               12.8 +/-    0.68      17.3 +/-    0.68  0.030 / 0.050
G12     181.3          13.0               14.0 +/-    0.82      36.5 +/-    0.82  0.040 / 0.040
G13     111.9          28.5               16.8 +/-    2.02      30.4 +/-    2.02  0.050 / 0.050
G15     151.5          29.2               17.9 +/-    1.37      31.8 +/-    1.37  0.080 / 0.170
G18     225.6          19.3               14.4 +/-    4.16      32.3 +/-    4.16  0.070 / 0.120
G20     238.0          81.7               13.5 +/-    0.50      13.6 +/-    0.50  0.050 / 0.290
G21     289.1          31.7               12.4 +/-    2.02      21.1 +/-    2.02  0.050 / 0.310
G25     213.5          33.7               16.2 +/-    3.88      26.3 +/-    3.88  0.090 / 0.130
G29     2.4            80.1               13.3 +/-    0.64      13.4 +/-    0.64  0.090 / 0.130