Abstract : Report developed under SBIR contract for topic BMDO99-003A. This contract effort demonstrated the feasibility of separating cruise missile class targets when there are multiple targets observed by a ground positioned acoustic sensor. Several programs (e.g., Steel Rattler, FASDR) have addressed the use of small, remotely deployed acoustic sensors for collecting early warning and rough track on cruise missiles. Typically, the quality of track expected is not precise enough for use as fire control data, but rather is useful to cue fire control sensors. Acoustic sensors in this role maximize the time available to engage targets and provide very early warning of impending attack. Field experimentation has indicated that using acoustic sensor data to develop tracks of single targets is feasible and practical. One of several challenges that have not been adequately addressed until this contract effort is how to develop tracks of multiple targets from acoustic data. This contract effort demonstrated algorithms that will identify signals of multiple targets and will parse individual target data from acoustic signals generated by multiple targets.