Implement a "best effort" behaviour for the retrieving of fits file when using DRMS: for all the requested period (from date 'a' to date 'b') the process first try to retrieve file with new format (AIA_PREFIX_NEW) and in case of unsuccess try with AIA_PREFIX_OLD.
Implement a "best effort" behaviour for the retrieving of fits file when using DRMS: for all the requested period (from date 'a' to date 'b') the process first try to retrieve file with new format (AIA_PREFIX_NEW) and in case of unsuccess try with AIA_PREFIX_OLD.