HRS science data consists of single-precision floating point values for the 500 science diodes. In accumulation mode these values contain unscrambled, co-added, and comb-added diode data. In rapid-readout mode the data comprise unscrambled raw counts from the detector diodes. The header file includes UDL values for X/Y deflections, horizontal/ vertical deflections, repeat codes, and bin identifications for substep patterns. Temperature, current, and voltage telemetry values from the SHP that are critical to the calibration are included in the header. The header also includes settings for the calibration switches and the filenames for reference files and tables. Science Data files are identified by the extensions ``.D0H'' and ``.D0D''.
