"Reanalysis" means the process of studying or examining something again, using new or different methods, in order to get a better understanding or interpretation of it. Full definition
Finally, making another key technical point, the Research Report argues against the use of reanalysis data in structural analysis since its use makes mathematically rigorous hypothesis testing virtually impossible. (carlineconomics.com)
Jackson D. L., M. Hughes and G. A. Wick (March 2016): Evaluation of landfalling atmospheric rivers along the U.S. West Coast in reanalysis data sets. (esrl.noaa.gov)
The NCEP / NCAR reanalysis dataset provides an alternative method of determining global temperatures. (skepticalscience.com)