PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-21:12:50
G10     264.7          36.1               17.8 +/-    1.15      27.7 +/-    1.15  0.040 / 0.050
G13     43.6           21.3               10.6 +/-    1.31      22.6 +/-    1.31  0.040 / 0.050
G15     61.5           50.2               13.5 +/-    0.98      17.0 +/-    0.98  0.200 / 0.610
G16     284.9          11.7               18.4 +/-    3.18      49.4 +/-    3.18  0.140 / 0.610
G18     297.1          63.9               14.9 +/-    0.98      16.4 +/-    0.98  0.110 / 0.430
G20     53.2           36.2               11.7 +/-    0.74      18.1 +/-    0.74  0.140 / 0.420
G21     3.0            71.5               16.9 +/-    0.60      17.7 +/-    0.60  0.040 / 0.110
G24     123.1          12.7               13.3 +/-    2.30      35.0 +/-    2.30  0.050 / 0.110
G27     318.7          18.7               16.6 +/-    1.52      37.6 +/-    1.52  0.110 / 0.140
G29     165.8          28.8               18.1 +/-    1.90      32.4 +/-    1.90  0.130 / 0.170