PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-21:58:10
G10     261.5          34.0               15.4 +/-    1.17      25.0 +/-    1.17  0.110 / 0.530
G13     45.5           23.8               11.9 +/-    1.57      23.9 +/-    1.57  0.110 / 0.510
G15     66.1           52.7               12.2 +/-    0.46      14.9 +/-    0.46  0.180 / 0.400
G16     287.4          12.6               14.7 +/-    1.98      38.6 +/-    1.98  0.210 / 0.420
G18     289.9          62.3               13.0 +/-    0.65      14.5 +/-    0.65  0.050 / 0.050
G20     51.2           38.4               12.5 +/-    0.55      18.6 +/-    0.55  0.040 / 0.050
G21     354.4          69.3               15.2 +/-    0.99      16.1 +/-    0.99  0.150 / 0.330
G26     260.5          10.3               15.5 +/-    1.71      42.9 +/-    1.71  0.130 / 0.260
G27     319.9          16.2               12.9 +/-    2.41      31.3 +/-    2.41  0.060 / 0.110
G29     165.7          32.8               17.2 +/-    1.52      28.4 +/-    1.52  0.070 / 0.090