PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-21:58:10
G10     257.9          31.5               13.4 +/-    1.95      22.8 +/-    1.95  0.160 / 0.420
G13     47.9           26.4               11.4 +/-    1.76      21.6 +/-    1.76  0.190 / 0.530
G15     71.8           54.8               12.2 +/-    0.29      14.5 +/-    0.29  0.120 / 0.350
G16     290.8          13.3               11.5 +/-    2.72      29.8 +/-    2.72  0.120 / 0.310
G18     282.8          60.6               12.8 +/-    0.75      14.5 +/-    0.75  0.040 / 0.050
G20     48.7           41.2               10.9 +/-    0.55      15.6 +/-    0.55  0.040 / 0.050
G21     347.4          66.8               10.4 +/-    0.68      11.3 +/-    0.68  0.140 / 0.220
G26     263.6          11.9               13.7 +/-    1.53      36.5 +/-    1.53  0.110 / 0.200
G27     321.1          13.2                9.7 +/-    1.86      25.2 +/-    1.86  0.050 / 0.080
G29     165.1          36.8               13.1 +/-    0.93      20.0 +/-    0.93  0.050 / 0.080