These are Linux 64-bit binaries of CAA/CEF tools http://caa.estec.esa.int/caa/software.xml CEFpass - Validate CEF syntax cefmerge - Merge all headers and data into single CEF file Usage: cefmerge -I /path/to/headers file.cef.gz Qtran - Convert CEF (produced by cefmerge) to CDF Usage: Qtran file.cef