...
The description of the RPW data products can be found in https://rpwissues.lesiacosmos.obspmesa.frint/rocsolarorbiterwiki/datadisplay/private/solo/rpw/docs/DPDD/ (restricted access)SOSP/Archive+Support+Data
Standards and metadata definitions for the RPW science data are presented in https://issues.cosmos.esa.int/solarorbiterwiki/display/SOSP/Metadata+Definition+for+Solar+Orbiter+Science+Data
...
N.B. You need SPICE kernels to perform convertion (see related question here)
How to retrieve Solar Orbiter orbit digest CDF files ?
The SOC provides CDF files that contain Solar Orbiter location and speed in HEE and HCI coordinate systems.
These files are made available in the SOC Public Confluence page (https://issues.cosmos.esa.int/solarorbiterwiki/)
A copy of these files are also saved by the LESIA in https://rpw.lesia.obspm.fr/roc/data/private/solo/soc/spice/cdf/ (restricted access)
Where is Solar Orbiter spacecraft currently?
You can use the "where is solar orbiter" ESA's tool for a quick look of spacecraft trajectory over the Sun.