The paper covers the continued development of a Payload Derived Position Acquisition System (PDPAS) to overcome current limitations posed on recovering the trajectory data for a generic parachute recovery system (PRS). The PDPAS is an instrumentation set and software algorithm that is to be installed onto PRS in order to estimate PRS state vector parameters in real-time for testing and operational use. The development of the PDPAD has progressed to a point where it is providing quality data and is ready for development into a usable instrumentation package. The paper discusses the concept of the PDPAS, the first implementation of the PDPAS, changes made to the PDPAS due to continued development, and the steps for needed for the PDPAS to be a validated instrumentation package.

This paper deals with the continuing development of a multistage aerodynamic delivery systems safety tool currently being used in conjunction with aerodynamic deceleration payload delivery systems testing at the U.S. Army Yuma Proving Ground. This tool was created to assist test planning officers with safety related concerns involving air delivery tests and was introduced at the previous Aerodynamic Decelerator Systems (ADS) conference. Present paper presents the latest version of this tool incorporating multiple airdrops per pass, elevation data and more accurate models of the payload delivery systems accounting for their weight and the altitude of a drop zone.

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