The latest ROSE documentation is located here: https://lasp.colorado.edu/maven/sdc/public/data/sdc/web/instrument_docs/rse/
ROSE Data is described in the SIS, as well as the README files, all of which are included in the above link.

ROSE data is available to browse at http://lasp.colorado.edu/maven/sdc/public/data/sci/rse/

Quick download links:

All Level 3 EDP files (~5 MB)