The C/NOFS IVM drift data can be obtained from CDAWeb at http://cdaweb.gsfc.nasa.gov/sp_phys/ (select CNOFS and then CNOFS_CINDI_IVM_500MS) in CDF or ASCII format or via ftp at http://spdf.gsfc.nasa.gov/pub/data/cnofs/cindi/ in CDF and HDF format. They are also available on the C/NOFS-CINDI homepage at http://cindispace.utdallas.edu/.