Data exist in three formats at the current time.
For data written in RDF there are 15 data files associated with each PSPC dataset, and 8 files associated with each HRI dataset. Data processed before mid-April 1994 in Germany are written in what we designate Rev0 German format. Data storage in the German files is significantly different to the oether two formats, and one must reformat the German events files before analysis is possible in the xselect or ftools environment. Detailed descriptions of each of the Rev0 and RDF files can be found in the Data Products Guide.