Fifth Gait plans to rapidly prototype and complete the S3E workbench demonstration during this Phase Ibased upon our Phase I/III SIRE2 (Space Ionizing Radiation Environment and Effects)Toolkit developed for the Missile Defense Agency. The Fifth Gait team includes Dr. Jonathan Fisher (PI), Dr. Jim Adams (the creator of CREME86), his graduate student (Zachary Robinson, a PhD Candidate at the University of Alabama at Huntsville), and Vanderbilt's Institute of Space and Defense Electronics (ISDE). Fifth Gait Technologies recently completed V1.4 of the Space Ionizing Environments and Effects (SIRE2) toolkit that provide many of the attributes requested by the AF182-070 SBIR Topic. SIRE2 was developed by enhancing NASA licensed technology via an MDA Phase I and III SBIR. SIRE2 provides legacy satellite and new arbitrary trajectory (i.e., missile/space vehicle) assessments with new state of the art environment models.SIRE2 also includes the new state of the art Robinson-Adams Solar Particle Model.Standard Stand-alone Space Environment (S3E) Workbench,SIRE2,Space Ionizing Radiation Environments and Effects,single event effects,ionizing dose,Solar Storm,Trapped Radiation,Cosmic rays