The CDC group at NOAA maintains an archive of the NCEP re-analysis, and threfore 'cdc' will be used to denote the product.
The cdc archive conists of yearly netcdf files.
Desription is included in the files.
Additional comments are in 'tmm_mf_ncep_cdc.F90
' .
! ncep ra has 6 hour resolution: tinterp.* : const6 tinterp.sp : interp6 tinterp.surf.inst : const6 tinterp.surf.aver : aver6 tmm.sourcekey.glb6x4.* : ncep-cdc tmm.sourcekey.glb1x1.* : ncep-cdc tmm.setup.006.apply : T tmm.setup.006.files : pres.nlog vort div vair shum hgt land sfcr pres icec skt uwnd.10m vwnd.10m lhtfl shtfl ugwd vgwd prate cprat tmm.setup.006.sources : ncep-cdc: tmm.setup.006.search : ${CO2}/ncep.reanalysis