The SXRP lies on one of the two sleds (Sled 1) and has no user commandable inputs. The data are stored in a 96 Mbyte capacity memory. Typically, a 24 hour observation interval will utilize 60 Mbytes of memory (equivalently TBD detected events). Polarimetry observations will be most effective if coordinated observations with SIXA (and MART-LIME) are obtained to monitor the time-variability of the source spectrum (e.g., Hercules X-1). Note that aspect information from TAUVEX is critical to obtaining the best performance from SXRP.