Fig. 9 Averaged anomaly correlations for 500-hPa heights as a function of forecast length and zonal wave number
group (waves 1-20,4-9, and 10-20) for 39 days of T62 forecasts from assimilations using NESDIS pre-processed
radiances (ctl, solid) and assimilation using level-1b radiances (exp, dashed) - Northern Hemisphere (top),
Southern Hemisphere (bottom).