DE3 amplitudes from CTMT and WINDII. (Left) DE3 amplitudes (m/s) computed from CTMT averaged over September to November and mapped to 17:00 to 07:00 local time difference at 22.5°E. (Right) Same as left but from HRDI and WINDII analysis. White areas are data gaps. Adapted with permission from Lieberman et al. (2013).